Add "no-multi-spaces" rule.

Author: armano2

docs/rules/no-multi-spaces.md

@@ -10,7 +10,7 @@ Examples of **incorrect** code for this rule:
 
 ```html
 <template>
-  <div class="foo"      :style="foo"\t
+  <div class="foo"      :style="foo"
     :foo="bar"         >
   </div>
 </template>

lib/rules/no-multi-spaces.js

@@ -24,8 +24,6 @@ module.exports = {
    * @returns {Object} AST event handlers.
    */
   create (context) {
-    const sourceCode = context.getSourceCode()
-
     function formatValue (token) {
       switch (token.type) {
         case 'HTMLSelfClosingTagClose': return '/>'
@@ -53,33 +51,16 @@ module.exports = {
 
         let prevToken = tokens.shift()
         for (const token of tokens) {
-          const length = token.range[0] - prevToken.range[1] + 1
-          const text = sourceCode.getText(token, length, 0).substring(0, length)
-
-          const match = text.match(/([^\r\n\t\s])([ \t]+)([>]?)([\n\r]?)/)
-          if (!match) {
-            prevToken = token
-            continue // there is no errors
-          }
-
-          const spaces = match[2].length
-          const requiredSpaces = match[3] === '>' || match[4] !== '' ? 0 : 1
-
-          if (spaces > requiredSpaces) {
+          const spaces = token.range[0] - prevToken.range[1]
+          if (spaces > 1 && token.loc.start.line === prevToken.loc.start.line) {
             context.report({
               node: token,
               loc: {
-                start: {
-                  line: prevToken.loc.end.line,
-                  column: prevToken.loc.end.column
-                },
-                end: {
-                  line: prevToken.loc.end.line,
-                  column: prevToken.loc.end.column + spaces
-                }
+                start: prevToken.loc.end,
+                end: token.loc.start
               },
               message: "Multiple spaces found before '{{displayValue}}'.",
-              fix: (fixer) => fixer.replaceTextRange([prevToken.range[1], prevToken.range[1] + spaces], requiredSpaces ? ' ' : ''),
+              fix: (fixer) => fixer.replaceTextRange([prevToken.range[1], token.range[0]], ' '),
               data: {
                 displayValue: formatValue(token)
               }

tests/lib/rules/no-multi-spaces.js

@@ -39,7 +39,8 @@ ruleTester.run('no-multi-spaces', rule, {
     '<template><div>{{test}} <!--        fooo           --></div></template>',
     '<template><div v-for="i in b">{{ i }}</div></template>',
     '<template><div v-for=" i in b ">{{ i }}</div></template>',
-    '<template><div :test="`           `"> {{ a }} </div></template>'
+    '<template><div :test="`           `"> {{ a }} </div></template>',
+    '<template><div :test="`           `">          \n        {{ a }} </div></template>'
   ],
   invalid: [
     {
@@ -118,12 +119,8 @@ ruleTester.run('no-multi-spaces', rule, {
     },
     {
       code: '<template><foo v-foo="" \n         class="foo"    /></template>',
-      output: '<template><foo v-foo=""\n         class="foo" /></template>',
+      output: '<template><foo v-foo="" \n         class="foo" /></template>',
       errors: [
-        {
-          message: "Multiple spaces found before 'class'.",
-          type: 'HTMLIdentifier'
-        },
         {
           message: "Multiple spaces found before '/>'.",
           type: 'HTMLSelfClosingTagClose'