fix issue where color formatting text is leaking

See angular#1131

Author: hankduan

lib/launcher.js

@@ -310,11 +310,17 @@ TaskReporter_.prototype.log_ = function(data) {
   for ( var i = 0; i < data.length; i++ ) {
     if (this.insertTag) {
       this.insertTag = false;
+      if (data[i] === '\x1B' && data.substring(i, i+4) === '\x1B[0m' ) {
+        // Prevent coloring tag
+        this.buffer += ('\x1B[0m' + tag);
+        i += 3;
+        continue;
+      }
+      
       this.buffer += tag;
     }
     if (data[i] === '\n') {
       this.insertTag = true;
-      this.buffer += '\x1B[0m'; // Prevent color from leaking into next line
     }
     this.buffer += data[i];
   }