Removed capturing where not needed.

diff --git a/lib/clean.js b/lib/clean.js
index 0433c31..3fb7a7b 100644 (file)
--- a/lib/clean.js
+++ b/lib/clean.js
@@ -106,7 +106,7 @@ var CleanCSS = {
     // remove extra spaces inside content
     replace(/([\(\{\}:;=,\n]) /g, '$1');
     replace(/ ([!\)\{\};=,\n])/g, '$1');
-    replace(/(\r\n|\n)\}/g, '}');
+    replace(/(?:\r\n|\n)\}/g, '}');
     replace(/([\{;,])(?:\r\n|\n)/g, '$1');
     replace(/content :/g, 'content:');
 
@@ -163,7 +163,7 @@ var CleanCSS = {
     });
 
     // zero + unit to zero
-    replace(/(\s|:|,)0(px|em|ex|cm|mm|in|pt|pc|%)/g, '$1' + '0');
+    replace(/(\s|:|,)0(?:px|em|ex|cm|mm|in|pt|pc|%)/g, '$1' + '0');
     replace(/rect\(0(?:px|em|ex|cm|mm|in|pt|pc|%)/g, 'rect(0');
 
     // none to 0
@@ -227,7 +227,7 @@ var CleanCSS = {
       replace(/(.+)(@charset [^;]+;)/, '$2$1');
 
     // remove all extra charsets that are not at the beginning
-    replace(/(.)(@charset [^;]+;)/g, '$1');
+    replace(/(.)(?:@charset [^;]+;)/g, '$1');
 
     // remove universal selector when not needed (*#id, *.class etc)
     replace(/\*([\.#:\[])/g, '$1');