Ignore query string in dest and src when generate grunt config.

lib/configwriter.js

@@ -15,6 +15,11 @@ var deepMerge = function (origCfg, cfg) {
   return outCfg;
 };
 
+// convert url to path
+var pathify = function (url) {
+  return url.replace(/\?.*$/g, '');
+};
+
 //
 // Create a config writer for the furnished flow.
 // The created config will:
@@ -146,6 +151,10 @@ ConfigWriter.prototype.process = function (file, config) {
   }
 
   lfile.blocks.forEach(function (block) {
+    block = _.cloneDeep(block);
+    block.dest = pathify(block.dest);
+    block.src = block.src.map(pathify);
+
     // FIXME: support several searchPath...
     var context = {
       inDir: self.root || lfile.searchPath[0],

test/fixtures/block_with_query_string_in_url.html

@@ -0,0 +1,3 @@
+<!-- build:js foo.js?type=foo -->
+<script src="baz.js?type=baz"></script>
+<!-- endbuild -->

test/test-usemin.js

@@ -619,6 +619,22 @@ describe('useminPrepare', function () {
     assert.equal(copyCfg.generated.files[0].dest, path.normalize('dist/scripts/plugins.js'));
   });
 
+  it('should allow query string in url', function () {
+    grunt.log.muted = true;
+    grunt.config.init();
+    grunt.config('useminPrepare', {
+      html: 'index.html'
+    });
+    grunt.file.copy(path.join(__dirname, 'fixtures/block_with_query_string_in_url.html'), 'index.html');
+    grunt.task.run('useminPrepare');
+    grunt.task.start();
+
+    var concatCfg = grunt.config('concat');
+    assert.ok(concatCfg);
+    assert.equal(concatCfg.generated.files[0].dest, path.normalize('.tmp/concat/foo.js'));
+    assert.deepEqual(concatCfg.generated.files[0].src, [path.normalize('baz.js')]);
+  });
+
   it('should allow to post configure generated steps', function () {
 
     var concatPostConfig = {