Issue #2400287 by hass, cutesquirrel, borisson_, rteijeiro, aerozeppelin, yuriy.babenko, cyb.tachyon, pfrenssen, deanflory, webchick, David_Rothstein, cilefen, aspilicious, netbek, stefan.r, moshe weitzman, nod_, minakshiPh, pandaski: Remove all occurences of sourceMappingURL and sourceURL when JS files are aggregated

includes/common.inc

@@ -5166,6 +5166,8 @@ function drupal_build_js_cache($files) {
         $contents .= file_get_contents($path) . ";\n";
       }
     }
+    // Remove JS source and source mapping urls or these may cause 404 errors.
+    $contents = preg_replace('/\/\/(#|@)\s(sourceURL|sourceMappingURL)=\s*(\S*?)\s*$/m', '', $contents);
     // Prefix filename to prevent blocking by firewalls which reject files
     // starting with "ad*".
     $filename = 'js_' . drupal_hash_base64($contents) . '.js';