Fix the indentation according to jshintrc

Author: mgechev

gulpfile.js

@@ -3,5 +3,5 @@ var gulp = require('gulp'),
     shell = require('gulp-shell');
 
 gulp.task('jsdoc', shell.task([
-    './node_modules/.bin/jsdoc -c ./doc-config.json',
+  './node_modules/.bin/jsdoc -c ./doc-config.json',
 ]));