Update README.md

Bcow7 · web-flow · commit eb1c1d1134e7 · 2016-11-14T09:59:41.000+01:00
Add missing " ' "
diff --git a/README.md b/README.md
@@ -43,7 +43,7 @@ gulp.task('documentation', function () {
 
   // Generating a pretty HTML documentation site
   gulp.src('./index.js')
-    .pipe(gulpDocumentation('html))
+    .pipe(gulpDocumentation('html'))
     .pipe(gulp.dest('html-documentation'));
 
   // Generating raw JSON documentation output
