wrapper instead of helper

"helper function" term reminds "utility libraries" but "wrapper" term refers "function decorators" and in this context wrapper can be more self-descriptive and meaningful.

Author: lumosmind

1-js/06-advanced-functions/10-bind/article.md

@@ -270,7 +270,7 @@ What if we'd like to fix some arguments, but not the context `this`? For example
 
 The native `bind` does not allow that. We can't just omit the context and jump to arguments.
 
-Fortunately, a helper function `partial` for binding only arguments can be easily implemented.
+Fortunately, a wrapper function `partial` for binding only arguments can be easily implemented.
 
 Like this: