add .less to foldnestmax/formatoptions settings

vimrc

@@ -57,7 +57,7 @@ autocmd FileType c,cpp,perl,php,java,glsl set cindent foldmethod=syntax
 autocmd FileType cpp,java,less set foldnestmax=2
 autocmd FileType python set autoindent foldmethod=indent
 autocmd FileType sh set autoindent foldmethod=syntax
-autocmd FileType javascript,html set foldnestmax=3 formatoptions-=o
+autocmd FileType javascript,less,html set foldnestmax=3 formatoptions-=o
 autocmd FileType javascript,less set foldmethod=indent
 autocmd FileType tex,latex set wrap showbreak=+ spell makeprg=pdflatex\ -interaction=nonstopmode\ %
 autocmd FileType sml set autoindent