Retain spaces before color().

Author: Marc Robichaud

index.js

@@ -45,6 +45,7 @@ function transformColor(string, source) {
   if (!balancedMatches) {
     throw new Error("Missing closing parentheses in '" + string + "'", source)
   }
+  var leadingSpacings = balancedMatches.pre.match(/^\s*/)[0]
 
-  return string.slice(0, index) + colorFn.convert("color(" + balancedMatches.body + ")") + transformColor(balancedMatches.post)
+  return string.slice(0, index) + leadingSpacings + colorFn.convert("color(" + balancedMatches.body + ")") + transformColor(balancedMatches.post)
 }

test/fixtures/color.css

@@ -7,4 +7,6 @@ body {
   border-bottom-color: hover-color(red);
 
   border-right-color: hover-color(color(red tint(50%)));
+
+  border-color: color(#999 a(0.8)) color(#999 a(0.8));
 }

test/fixtures/color.expected.css

@@ -7,4 +7,6 @@ body {
   border-bottom-color: hover-color(red);
 
   border-right-color: hover-color(rgb(255, 128, 128));
+
+  border-color: rgba(153, 153, 153, 0.8) rgba(153, 153, 153, 0.8);
 }