How to not add whitespaces?

[0804d23d]

I saw #27, but probably because I'm new to Vim, and also perhaps it's because something from VimTeX is interfering with vim-surround, I have settled with selecting the text I want to add a delimiter in visual mode, press S then whatever the delimiter in mind, but how can I get rid of the whitespaces added at the beginning and the end?

In #27, someone mentioned "use the close paren", but after reading the doc, I still have no idea what it means by "close paren". If it's the change surrounding mentioned in the doc *cs*, then even if *cs* can add a delimiter to whatever I have selected, it's not working for me because in either visual or insert mode, pressing c just remove the entire word selected (I'm using MacVIM).

So the only options that work for me are using S + delim, or ysW( (and similar). But both of them add whitespaces at the beginning and the end, which is really annoying.

[tpope]

I still have no idea what it means by "close paren"

It's ).

So the only options that work for me are using S + delim, or ysW(

That ( is an "open paren". It's the thing you're supposed to replace with a "close paren".