[Sass] Support attribute selectors with spaces around the =.

doc-src/SASS_CHANGELOG.md

@@ -3,6 +3,14 @@
 * Table of contents
 {:toc}
 
+## 2.2.10 (Unreleased)
+
+* Add support for attribute selectors with spaces around the `=`.
+  For example:
+
+    a[href = http://google.com]
+      color: blue
+
 ## [2.2.9](http://github.com/nex3/haml/commit/2.2.9)
 
 There were no changes made to Sass between versions 2.2.8 and 2.2.9.

lib/sass/engine.rb

@@ -107,7 +107,7 @@ module Sass
     MIXIN_INCLUDE_CHAR    = ?+
 
     # The regex that matches properties of the form <tt>name: prop</tt>.
-    PROPERTY_NEW_MATCHER = /^[^\s:"]+\s*[=:](\s|$)/
+    PROPERTY_NEW_MATCHER = /^[^\s:"\[]+\s*[=:](\s|$)/
 
     # The regex that matches and extracts data from
     # properties of the form <tt>name: prop</tt>.

test/sass/engine_test.rb

@@ -673,6 +673,17 @@ foo {
 CSS
   end
 
+  def test_attribute_selector_with_spaces
+    assert_equal(<<CSS, render(<<SASS))
+a b[foo = bar] {
+  c: d; }
+CSS
+a
+  b[foo = bar]
+    c: d
+SASS
+  end
+
   def test_quoted_colon
     assert_equal(<<CSS, render(<<SASS))
 a b[foo="bar: baz"] {