Fix typos

core-scroll-header-panel.html

@@ -11,13 +11,12 @@
 `core-scroll-header-panel` contains a header section and a content section.  The
 header is initially on the top part of the view but it scrolls away with the 
 rest of the scrollable content.  Upon scrolling slightly up at any point, the 
-header scrolls back into view.  This is useful for saving screen space 
-and allows users to access important controls by easily moving them back to the 
-view.
+header scrolls back into view.  This saves screen space and allows users to
+access important controls by easily moving them back to the view.
 
 `core-scroll-header-panel` works well with `core-toolbar` but can use any element 
-that represents a header by adding a `core-header` class to it.  And use attribute 
-`content` to indicate it's a content section.
+that represents a header by adding a `core-header` class to it.  Use attribute 
+`content` to delineate the content section.
 
     <core-scroll-header-panel>
       <core-toolbar>Header</core-toolbar>
@@ -109,7 +108,7 @@
       fixed: false,
 
       /**
-       * If true, the condensed header is always shown and not moves away.
+       * If true, the condensed header is always shown and does not move away.
        *
        * @attribute keepCondensedHeader
        * @type boolean
@@ -120,9 +119,9 @@
       /**
        * The height of the header when it is at its full size.
        *
-       * By default, the height will be measused when it is ready.  If the height
-       * changes later user needs to either set this value to reflect the new
-       * height or invoke `measureHeaderHeight()`.
+       * By default, the height will be measured when it is ready.  If the height
+       * changes later the user needs to either set this value to reflect the
+       * new height or invoke `measureHeaderHeight()`.
        *
        * @attribute headerHeight
        * @type number