More readable creation of grep shell command

Author: wfleming

index.js

@@ -35,7 +35,7 @@ var printIssue = function(fileName, lineNum, matchedString){
 
 var findFixmes = function(file){
   // Prepare the grep string for execution (uses BusyBox grep)
-  var grepString = "grep -inHwoE " + fixmeStrings + " \"" + file + "\"";
+  var grepString = ["grep -inHwoE", fixmeStrings, '"' + file + '"'].join(" ");
 
   // Execute grep with the FIXME patterns
   exec(grepString, function (error, stdout, stderr) {