Use React friendly nesting variant

Closes #117

Author: tpope

plugin/commentary.vim

@@ -54,7 +54,7 @@ function! s:go(...) abort
     let line = getline(lnum)
     if strlen(r) > 2 && l.r !~# '\\'
       let line = substitute(line,
-            \'\M'.r[0:-2].'\zs\d\*\ze'.r[-1:-1].'\|'.l[0].'\zs\d\*\ze'.l[1:-1],
+            \'\M' . substitute(l, '\ze\S\s*$', '\\zs\\d\\*\\ze', '') . '\|' . substitute(r, '\S\zs', '\\zs\\d\\*\\ze', ''),
             \'\=substitute(submatch(0)+1-uncomment,"^0$\\|^-\\d*$","","")','g')
     endif
     if uncomment