fix: MD012 multiple blank lines (#12181)

mdn · Jan 19, 2022 · e752a8f · e752a8f
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diff --git a/files/en-us/glossary/advance_measure/index.md b/files/en-us/glossary/advance_measure/index.md
@@ -15,4 +15,3 @@ For a horizontal inline axis, this will be the width of the character.
 ## See also
 
 - {{cssxref("&lt;length&gt;")}}
-
diff --git a/files/en-us/glossary/hoisting/index.md b/files/en-us/glossary/hoisting/index.md
@@ -16,7 +16,6 @@ Note that doing so can lead to unexpected errors, and is not generally recommend
 > **Note:** The term hoisting is not used in any normative specification prose prior to [ECMAScript® 2015 Language Specification](https://www.ecma-international.org/ecma-262/6.0/index.html).
 > Hoisting was thought up as a general way of thinking about how execution contexts (specifically the creation and execution phases) work in JavaScript.
 
-
 ## Function hoisting
 
 One of the advantages of hoisting is that it lets you use a function before you declare it in your code.
@@ -45,7 +44,6 @@ The result of the code above is the same: "My cat's name is Tiger"
 */
 ```
 
-
 ## Variable hoisting
 
 Hoisting works with variables too, so you can use a variable in code before it is declared and/or initialized.
@@ -112,13 +110,11 @@ The code will succeed provided the line that initializes the variable is execute
 
 For information and examples see [`let` > temporal dead zone](/en-US/docs/Web/JavaScript/Reference/Statements/let#temporal_dead_zone_tdz).
 
-
 ## `class` hoisting
 
 Classes defined using a [class declaration](/en-US/docs/Web/JavaScript/Reference/Classes#class_declarations) are hoisted, which means that JavaScript has a reference to the class.
 However the class is not initialized by default, so any code that uses it before the line in which it is initialized is executed will throw a `ReferenceError`.
 
-
 ## Function and class expression hoisting
 
 [Function expressions](/en-US/docs/Web/JavaScript/Reference/Operators/function) and [class expressions](/en-US/docs/Web/JavaScript/Reference/Classes#class_expressions) are not hoisted.
@@ -127,7 +123,6 @@ The expressions evaluate to a function or class (respectively), which are typica
 In this case the variable declaration is hoisted and the expression is its initialization.
 Therefore the expressions are not evaluated until the relevant line is executed.
 
-
 ## See also
 
 - [`var` statement](/en-US/docs/Web/JavaScript/Reference/Statements/var) — MDN

diff --git a/files/en-us/glossary/parameter/index.md b/files/en-us/glossary/parameter/index.md
@@ -20,7 +20,6 @@ const argument = 'foo';
 example(argument);
 ```
 
-
 Note the difference between _parameters_ and _arguments_:
 
 - Function parameters are the names listed in the function's definition.

diff --git a/files/en-us/glossary/transferable_objects/index.md b/files/en-us/glossary/transferable_objects/index.md
@@ -47,7 +47,6 @@ console.log(uInt8Array.byteLength);  // 0
 > However their underlying buffer is an {{jsxref("ArrayBuffer")}}, which is a transferable object.
 > We could have sent `uInt8Array.buffer` in the data parameter, but not `uInt8Array` in the transfer array.
 
-
 ### Transferring during a cloning operation
 
 The code below shows a {{domxref("structuredClone()")}} operation where the underlying buffer is copied from the original object to the clone.
@@ -87,7 +86,6 @@ The items that can be _transferred_ are:
 - {{domxref("VideoFrame")}}
 - {{domxref("OffscreenCanvas")}}
 
-
 > **Note:** Transferrable objects are marked up in [Web IDL files](https://github.com/w3c/webref/tree/main/ed/idl) with the attribute `Transferrable`.
 
 ## See also

diff --git a/files/en-us/glossary/transient_activation/index.md b/files/en-us/glossary/transient_activation/index.md
@@ -21,5 +21,3 @@ Examples of APIs that require _transient activation_ are:
 
 - {{domxref("MediaDevices.selectAudioOutput()")}}
 - [HTML Living Standard > Transient activation](https://html.spec.whatwg.org/multipage/interaction.html#transient-activation)
-
-
diff --git a/files/en-us/learn/javascript/building_blocks/events/index.md b/files/en-us/learn/javascript/building_blocks/events/index.md
@@ -444,7 +444,6 @@ The output is as follows:
 
 > **Note:** for the full source code, see [preventdefault-validation.html](https://github.com/mdn/learning-area/blob/master/javascript/building-blocks/events/preventdefault-validation.html) (also see it [running live](https://mdn.github.io/learning-area/javascript/building-blocks/events/preventdefault-validation.html) here.)
 
-
 ## Event bubbling and capture
 
 Event bubbling and capture are terms that describe phases in how the browser handles events targeted at nested elements.

diff --git a/files/en-us/learn/javascript/building_blocks/looping_code/index.md b/files/en-us/learn/javascript/building_blocks/looping_code/index.md
@@ -77,7 +77,6 @@ button {
 
 Here's the JavaScript code that implements this example:
 
-
 ```js
 const btn = document.querySelector('button');
 const canvas = document.querySelector('canvas');
@@ -932,7 +931,6 @@ for (const item of array) {
 }
 ```
 
-
 `for`:
 
 ```

diff --git a/files/en-us/learn/performance/video/index.md b/files/en-us/learn/performance/video/index.md
@@ -113,8 +113,6 @@ Offering more modest bandwidth savings, setting `preload="metadata"` may downloa
 
 Changing the setting to `auto` tells the browser to automatically download the entire video. Do this only when playback is very likely. Otherwise, it wastes a lot of bandwidth.
 
-
-
 ### Consider streaming
 
 [Video streaming allows the proper video size and bandwidth](https://www.smashingmagazine.com/2018/10/video-playback-on-the-web-part-2/) (based on network speed) to be delivered to the end user. Similar to responsive images, the correct size video is delivered to the browser, ensuring fast video startup, low buffering, and optimized playback.

diff --git a/files/en-us/learn/server-side/django/generic_views/index.md b/files/en-us/learn/server-side/django/generic_views/index.md
@@ -194,12 +194,9 @@ You might also use the `{% empty %}` template tag to define what happens if the
 </ul>
 ```
 
-
 While not used here, within the loop Django will also create other variables that you can use to track the iteration.
 For example, you can test the `forloop.last` variable to perform conditional processing the last time that the loop is run.
 
-
-
 #### Accessing variables
 
 The code inside the loop creates a list item for each book that shows both the title (as a link to the yet-to-be-created detail view) and the author.

diff --git a/files/en-us/mdn/structures/page_types/api_landing_page_template/index.md b/files/en-us/mdn/structures/page_types/api_landing_page_template/index.md
@@ -159,7 +159,6 @@ And/or include a list of links to useful code samples that live elsewhere:
 
 {{Compat("path.to.feature.Interface_1")}}
 
-
 {{Compat("path.to.feature.Interface_2")}}
 
 ## See also

diff --git a/files/en-us/mdn/structures/page_types/css_selector_page_template/index.md b/files/en-us/mdn/structures/page_types/css_selector_page_template/index.md
@@ -79,7 +79,6 @@ browser-compat: css.selectors.NameOfTheSelector
 >
 > _Remember to remove this whole explanatory note before publishing_
 
-
 {{CSSRef}}{{SeeCompatTable}}{{Deprecated_Header}}
 
 The summary paragraph — start by naming the selector and saying what it does. This should ideally be 1 or 2 short sentences.

diff --git a/files/en-us/mdn/structures/page_types/glossary_page_template/index.md b/files/en-us/mdn/structures/page_types/glossary_page_template/index.md
@@ -39,7 +39,6 @@ tags:
 > ---
 > _Remember to remove this whole explanatory note before publishing_
 
-
 The **TermBeingDefined** is ... (include concise definition of the term being defined).
 
 Include further supporting information as required, but not much — no more than 2 more small paragraphs. Any further detailed information, code examples, tutorials, etc. should go in separate articles.

diff --git a/files/en-us/mdn/structures/page_types/http_header_page_template/index.md b/files/en-us/mdn/structures/page_types/http_header_page_template/index.md
@@ -71,7 +71,6 @@ browser-compat: path.to.feature.NameOfTheHeader
 >
 > _Remember to remove this whole explanatory note before publishing_
 
-
 {{SeeCompatTable}}{{deprecated_header}}{{httpsidebar}}
 
 The summary paragraph — start by naming the http header and saying what it does.

diff --git a/files/en-us/mozilla/add-ons/webextensions/implement_a_settings_page/index.md b/files/en-us/mozilla/add-ons/webextensions/implement_a_settings_page/index.md
@@ -198,7 +198,6 @@ Now:
 - visit "`about:addons`" to open the settings and click the Preferences button next to the extension's entry and change the border color.
 - reload the web page to see the difference.
 
-
 ## Learn more
 
 - [`options_ui`](/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/options_ui) key of `manifest.json` reference documentation

diff --git a/files/en-us/mozilla/add-ons/webextensions/internationalization/index.md b/files/en-us/mozilla/add-ons/webextensions/internationalization/index.md
@@ -399,4 +399,3 @@ Then, for each locale supported in the extension you want to test, follow the in
 Once Firefox is running in your test language, [install the extension temporarily](https://extensionworkshop.com/documentation/develop/temporary-installation-in-firefox). After installing your extension, in `about:debugging`, if you've set up your extension correctly, you see the extension listed with its icon, name, and description in the chosen language. You can also see the localized extension details in `about:addons`. Now exercise the extension's features to ensure the translations you need are in place. 
 
 If you'd like to try this process out, you can use the [notify-link-clicks-i18n](https://github.com/mdn/webextensions-examples/tree/master/notify-link-clicks-i18n) extension. Set up Firefox to display one of the languages supported in this example (German, Dutch, or Japanese). Load the extension and go to a website. Click a link to see the translated version of the notification reporting the link's URL.
-
diff --git a/.../mozilla/add-ons/webextensions/manifest.json/chrome_settings_overrides/index.md b/.../mozilla/add-ons/webextensions/manifest.json/chrome_settings_overrides/index.md
@@ -34,7 +34,6 @@ browser-compat: webextensions.manifest.chrome_settings_overrides
 
 Use the `chrome_settings_overrides` key to override the browser's home page and add a new search engine.
 
-
 ## Syntax
 
 The `chrome_settings_overrides` key is an object that may have the following properties:
@@ -173,7 +172,6 @@ The `chrome_settings_overrides` key is an object that may have the following pro
 
 This example shows how to set a search provider.
 
-
 ```json
 "chrome_settings_overrides": {
   "search_provider": {

diff --git a/...us/mozilla/add-ons/webextensions/manifest.json/content_security_policy/index.md b/...us/mozilla/add-ons/webextensions/manifest.json/content_security_policy/index.md
@@ -93,7 +93,6 @@ Keep the rest of the policy, but also require that images should be packaged wit
 "content_security_policy": "script-src 'self'; object-src 'self'; img-src 'self'"
 ```
 
-
 ### Invalid examples
 
 Policy that omits the `"object-src"` directive:

diff --git a/files/en-us/mozilla/firefox/experimental_features/index.md b/files/en-us/mozilla/firefox/experimental_features/index.md
@@ -63,7 +63,6 @@ The current implementation is a little inelegant but is basically functional. (S
   </tbody>
 </table>
 
-
 ### inert attribute
 
 The {{domxref("HTMLElement")}} property {{DOMxRef("HTMLElement.inert")}} is a {{jsxref("Boolean")}}, when present, may make the browser "ignore" the element from assistive technologies, page search and text selection. For more details on the status of this feature see {{bug(1655722)}}.
@@ -553,7 +552,6 @@ The [`@layer`](en-US/docs/Web/CSS/@layer) rule declares a cascade layer, which a
   </tbody>
 </table>
 
-
 ### Property: hyphenate-character
 
 The {{cssxref("hyphenate-character")}} property can be used to set a string that is used instead of a hyphen character (`-`) at the end of a hyphenation line break.
@@ -596,7 +594,6 @@ It can also be used to specify that the character is selected to be appropriate
   </tbody>
 </table>
 
-
 ## SVG
 
 ### SVGPathSeg APIs
@@ -1355,7 +1352,6 @@ See these bugs for details: {{bug(1556362)}}, {{bug(1556373)}}, {{bug(1556365)}}
   </tbody>
 </table>
 
-
 ### Payment Request API
 
 #### Primary payment handling
@@ -1708,7 +1704,6 @@ This also changes the console warning; if the upgrade succeeds, the message indi
   </tbody>
 </table>
 
-
 ### Clear-Site-Data "cache" directive
 
 The [`Clear-Site-Data`](/en-US/docs/Web/HTTP/Headers/Clear-Site-Data) HTTP response header `cache` directive clears the browser cache for the requesting website.

diff --git a/files/en-us/mozilla/firefox/index.md b/files/en-us/mozilla/firefox/index.md
@@ -23,7 +23,6 @@ Learn how to create add-ons for [Firefox](https://www.mozilla.org/firefox/), how
 - Developer release notes
   - : [Developer-focused release notes](/en-US/docs/Mozilla/Firefox/Releases); learn what new capabilities for both Web sites and add-ons arrive in each version of Firefox.
 
-
 ## Firefox channels
 
 Firefox is available in five **channels**.

diff --git a/files/en-us/mozilla/firefox/releases/95/index.md b/files/en-us/mozilla/firefox/releases/95/index.md
@@ -36,7 +36,6 @@ No notable changes
 
 - {{domxref("SpeechSynthesisEvent.elapsedTime")}} now returns the elapsed time in seconds rather than milliseconds, matching an update to the specification (see {{bug(1732498)}}).
 
-
 ### WebDriver conformance (Marionette)
 
 - The `port` used by Marionette is now written to the `MarionetteActivePort` file in the profile directory. This can be used to easily retrieve the `port`, which before was only possible by parsing the `prefs.js` file of the profile. ({{bug(1735162)}}).

diff --git a/files/en-us/mozilla/firefox/releases/96/index.md b/files/en-us/mozilla/firefox/releases/96/index.md
@@ -45,14 +45,12 @@ No notable changes.
   ({{bug(1666203)}}).
 - The [Web Locks API](/en-US/docs/Web/API/Web_Locks_API) is enabled by default, allowing web apps running in multiple tabs or workers to coordinate the use of resources. ({{bug(1740044)}}).
 
-
 #### Canvas
 
 - Image encoder support has been added for the [WebP](/en-US/docs/Web/Media/Formats/Image_types#webp_image) image format.
   This allows canvas elements to export their content as webp data when using the methods: {{domxref("HTMLCanvasElement.toDataURL()")}}, {{domxref("HTMLCanvasElement.toBlob()")}}, and {{domxref("OffscreenCanvas.convertToBlob", "OffscreenCanvas.toBlob")}}.
   ({{bug(1511670)}}).
 
-
 #### DOM
 
 - The {{domxref("IntersectionObserver.IntersectionObserver()","IntersectionObserver()")}} constructor now sets the default `rootMargin` if an empty string is passed in the associated parameter option, instead of throwing an exception ({{bug(1738791)}}).
@@ -70,7 +68,6 @@ No notable changes.
 
 ## Changes for add-on developers
 
-
 ## Older versions
 
 {{Firefox_for_developers(95)}}
diff --git a/files/en-us/mozilla/firefox/releases/98/index.md b/files/en-us/mozilla/firefox/releases/98/index.md
@@ -55,7 +55,6 @@ This article provides information about the changes in Firefox 98 that will affe
 
 ## Changes for add-on developers
 
-
 #### Removals
 
 ### Other

diff --git a/.../accessibility/accessibility_colon__what_users_can_to_to_browse_safely/index.md b/.../accessibility/accessibility_colon__what_users_can_to_to_browse_safely/index.md
@@ -38,7 +38,6 @@ CSS Transition events are supported. Examples include:
 - `transitionend`
 - `transitioncancel`
 
-
 ### Safari 10.1 and above (Desktop)
 
 Do not enable Auto-Play (does not work for gifs)
@@ -94,7 +93,6 @@ Most Operating Systems have a way to let the user make an adjustment on the work
 - [Color vision simulation](/en-US/docs/Tools/Accessibility_inspector/Simulation)
 - Discussion: "[What is the “grayscale” setting for in accessibility options?](https://ask.metafilter.com/312049/What-is-the-grayscale-setting-for-in-accessibility-options)"
 
-
 ### Contributors
 
 Many, many thanks to Eric Eggert from [Knowbility;](https://knowbility.org/) for his discussions and huge help on this topic.
diff --git a/files/en-us/web/accessibility/aria/aria_techniques/index.md b/files/en-us/web/accessibility/aria/aria_techniques/index.md
@@ -102,8 +102,6 @@ The techniques below describe each composite role as well as their required and
    - [`alertdialog`](/en-US/docs/Web/Accessibility/ARIA/Roles/alertdialog_role)
    - [`dialog`](/en-US/docs/Web/Accessibility/ARIA/Roles/dialog_role)
 
-
-
 ## States and properties
 
 ### Widget attributes
@@ -134,15 +132,13 @@ The techniques below describe each composite role as well as their required and
 - [`aria-valuenow`](/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-valuenow)
 - [`aria-valuetext`](/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-valuetext)
 
-
 ### Live region attributes
 
 - [`aria-live`](/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-live)
 - [`aria-relevant`](/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-relevant)
 - [`aria-atomic`](/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-atomic)
 - [`aria-busy`](/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-busy)
 
-
 ### Drag &amp; drop attributes
 
 - [`aria-dropeffect`](/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-dropeffect) {{deprecated_inline}}

diff --git a/files/en-us/web/accessibility/aria/attributes/aria-checked/index.md b/files/en-us/web/accessibility/aria/attributes/aria-checked/index.md
@@ -91,4 +91,3 @@ myHTMLElement.ariaChecked = true;
     {{ListSubpagesForSidebar("/en-US/docs/Web/Accessibility/ARIA/Attributes")}}
 
 </section>
-
diff --git a/files/en-us/web/accessibility/aria/attributes/aria-colcount/index.md b/files/en-us/web/accessibility/aria/attributes/aria-colcount/index.md
@@ -67,8 +67,6 @@ The first rule of ARIA use is "if you can use a native feature with the semantic
 </table>
 ```
 
-
-
 ## Values
 
 - `<integer>`
@@ -91,7 +89,6 @@ Inherits into roles:
 | ------------- | ------  |
 | {{SpecName("ARIA","#aria-colcount","ARIA: aria-colcount Attribute")}}  | {{Spec2('ARIA')}} |
 
-
 ## See Also
 
 - [`aria-colindex`](/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-colindex)
diff --git a/files/en-us/web/accessibility/aria/attributes/aria-expanded/index.md b/files/en-us/web/accessibility/aria/attributes/aria-expanded/index.md
@@ -75,7 +75,6 @@ A parent row is a row that can be expanded or collapsed to show or hide a set of
 - `undefined` (default)
   - : The element does not own or control a grouping element that is expandable.
 
-
 ## ARIAMixin API
 
 - {{domxref("Element.ariaExpanded")}}

diff --git a/files/en-us/web/accessibility/aria/attributes/aria-keyshortcuts/index.md b/files/en-us/web/accessibility/aria/attributes/aria-keyshortcuts/index.md
@@ -139,4 +139,3 @@ Used in **ALL** roles.
 <strong><a href="/en-US/docs/Web/Accessibility/ARIA/Attributes">WAI-ARIA states and properties</a></strong>
 {{ListSubpagesForSidebar("/en-US/docs/Web/Accessibility/aria/Attributes")}}
 </section>
-
diff --git a/files/en-us/web/accessibility/aria/attributes/aria-labelledby/index.md b/files/en-us/web/accessibility/aria/attributes/aria-labelledby/index.md
@@ -75,7 +75,6 @@ In this example, the accessible name is "read more 13 ARIA attributes you need t
 
 4. The `aria-labelledby` property ignores repeated `id`s in its value. If an element is referenced more than one time, only the first reference is processed. `aria-labelledby="attr attr rm13 rm13">` is treated as `aria-labelledby="attr rm13">`
 
-
 5. The `aria-labelledby` property value can include content from elements that aren't even visible. While you should provide assistive technology users with the same content and all other users, you can include content from elements with the HTML {{htmlattrxref('hidden')}} attribute, CSS [`display: none`](/en-US/docs/Web/CSS/display), and CSS [`visibility: hidden`](/en-US/docs/Web/CSS/visibility) in the calculated name string.
 
 6. The `aria-labelledby` property incorporates the value of input elements. If the value references an `<input>`, the current value of the form control is included in the calculated name string, changing if the value is updated.

diff --git a/files/en-us/web/accessibility/aria/attributes/aria-level/index.md b/files/en-us/web/accessibility/aria/attributes/aria-level/index.md
@@ -72,4 +72,3 @@ Used in roles:
 <strong><a href="/en-US/docs/Web/Accessibility/ARIA/Attributes">WAI-ARIA states and properties</a></strong>
 {{ListSubpagesForSidebar("/en-US/docs/Web/Accessibility/aria/Attributes")}}
 </section>
-
diff --git a/files/en-us/web/accessibility/aria/attributes/aria-readonly/index.md b/files/en-us/web/accessibility/aria/attributes/aria-readonly/index.md
@@ -81,4 +81,3 @@ Inherited into roles:
 <strong><a href="/en-US/docs/Web/Accessibility/ARIA/Attributes">WAI-ARIA states and properties</a></strong>
 {{ListSubpagesForSidebar("/en-US/docs/Web/Accessibility/aria/Attributes")}}
 </section>
-
diff --git a/files/en-us/web/accessibility/aria/attributes/aria-roledescription/index.md b/files/en-us/web/accessibility/aria/attributes/aria-roledescription/index.md
@@ -79,4 +79,3 @@ Supported by all roles and by all base markup elements except for `role="generic
 <strong><a href="/en-US/docs/Web/Accessibility/ARIA/Attributes">WAI-ARIA states and properties</a></strong>
 {{ListSubpagesForSidebar("/en-US/docs/Web/Accessibility/aria/Attributes")}}
 </section>
-
diff --git a/files/en-us/web/accessibility/aria/attributes/aria-rowindex/index.md b/files/en-us/web/accessibility/aria/attributes/aria-rowindex/index.md
@@ -93,7 +93,6 @@ Inherited into roles:
 - [`gridcell`](/en-US/docs/Web/Accessibility/ARIA/Roles/gridcell_role)
 - [`rowheader`](/en-US/docs/Web/Accessibility/ARIA/Roles/rowheader_role)
 
-
 ## Specifications
 
 | Specification | Status | 
@@ -112,4 +111,3 @@ Inherited into roles:
 <strong><a href="/en-US/docs/Web/Accessibility/ARIA/Attributes">WAI-ARIA states and properties</a></strong>
 {{ListSubpagesForSidebar("/en-US/docs/Web/Accessibility/aria/Attributes")}}
 </section>
-
diff --git a/files/en-us/web/accessibility/aria/attributes/aria-rowspan/index.md b/files/en-us/web/accessibility/aria/attributes/aria-rowspan/index.md
@@ -45,7 +45,6 @@ Inherited into roles:
 - [`columnheader`](/en-US/docs/Web/Accessibility/ARIA/Roles/columnheader_role)
 - [`rowheader`](/en-US/docs/Web/Accessibility/ARIA/Roles/rowheader_role)
 
-
 ## Specifications
 
 | Specification | Status | 

diff --git a/files/en-us/web/accessibility/aria/attributes/aria-valuenow/index.md b/files/en-us/web/accessibility/aria/attributes/aria-valuenow/index.md
@@ -139,4 +139,3 @@ Inherited into roles:
 <strong><a href="/en-US/docs/Web/Accessibility/ARIA/Attributes">WAI-ARIA states and properties</a></strong>
 {{ListSubpagesForSidebar("/en-US/docs/Web/Accessibility/aria/Attributes")}}
 </section>
-