lib: fix extraneous space in module.js

An extra space was not caught by the linter due to what appears
to be a bug in eslint 4.3.0 — remove it.

PR-URL: #16199
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: apapirovski

lib/module.js

@@ -551,7 +551,7 @@ Module.prototype.load = function(filename) {
       ESMLoader.moduleMap.set(urlString,
                               new ModuleJob(ESMLoader, url, async () => ctx));
     } else {
-      const job =  ESMLoader.moduleMap.get(urlString);
+      const job = ESMLoader.moduleMap.get(urlString);
       if (job.reflect)
         job.reflect.exports.default.set(this.exports);
     }