Use ' instead of " for font urls

app/assets/stylesheets/source-sans-pro.css.erb

@@ -2,13 +2,13 @@
   font-family: 'Source Sans Pro';
   font-style: normal;
   font-weight: 300;
-  src: local('Source Sans Pro Light'), local('SourceSansPro-Light'), url("<%= asset_path("SourceSansPro-Light.ttf") %>") format('truetype');
+  src: local('Source Sans Pro Light'), local('SourceSansPro-Light'), url('<%= asset_path("SourceSansPro-Light.ttf") %>') format('truetype');
 }
 @font-face {
   font-family: 'Source Sans Pro';
   font-style: normal;
   font-weight: 400;
-  src: local('Source Sans Pro'), local('SourceSansPro-Regular'), url("<%= asset_path("SourceSansPro-Regular.ttf") %>") format('truetype');
+  src: local('Source Sans Pro'), local('SourceSansPro-Regular'), url('<%= asset_path("SourceSansPro-Regular.ttf") %>') format('truetype');
 }
 @font-face {
   font-family: 'Source Sans Pro';

vendor/assets/stylesheets/bootstrap.css.erb

@@ -2386,7 +2386,7 @@ input[type="button"].btn-block {
 @font-face {
   font-family: 'Glyphicons Halflings';
   src: url('<%= asset_path('glyphicons-halflings-regular.eot') %>');
-  src: url('<%= asset_path('glyphicons-halflings-regular.eot?#iefix') %>') format('embedded-opentype'), url('<%= asset_path('glyphicons-halflings-regular.woff') %>') format('woff'), url('<%= asset_path('glyphicons-halflings-regular.ttf') %>') format('truetype'), url('<%= asset_path('glyphicons-halflings-regular.svg#glyphicons-halflingsregular') %>') format('svg');
+  src: url('<%= asset_path('glyphicons-halflings-regular.eot') %>?#iefix') format('embedded-opentype'), url('<%= asset_path('glyphicons-halflings-regular.woff') %>') format('woff'), url('<%= asset_path('glyphicons-halflings-regular.ttf') %>') format('truetype'), url('<%= asset_path('glyphicons-halflings-regular.svg#glyphicons-halflingsregular') %>') format('svg');
 }
 
 .glyphicon {