Update indent guides

vimrc

@@ -12,8 +12,8 @@ set encoding=utf-8
 set expandtab
 set exrc
 set fillchars=vert:▐
-set foldlevelstart=1
-set foldmethod=manual
+set foldmethod=expr
+set foldexpr=nvim_treesitter#foldexpr()
 set hidden
 set history=50
 set incsearch
@@ -98,7 +98,7 @@ if filereadable(expand("~/.config/nvim/git.vimrc"))
   source ~/.config/nvim/git.vimrc
 endif
 
-" NERDTree setup
+" Tree setup
 if filereadable(expand("~/.config/nvim/nvimtree.vimrc"))
   source ~/.config/nvim/nvimtree.vimrc
 endif
@@ -123,16 +123,6 @@ if filereadable(expand("~/.config/nvim/markdown.vimrc"))
   source ~/.config/nvim/markdown.vimrc
 endif
 
-" Ruby setup
-if filereadable(expand("~/.config/nvim/ruby.vimrc"))
-  source ~/.config/nvim/ruby.vimrc
-endif
-
-" Rust setup
-if filereadable(expand("~/.config/nvim/rust.vimrc"))
-  source ~/.config/nvim/rust.vimrc
-endif
-
 " Color setup
 if filereadable(expand("~/.config/nvim/colors.vimrc"))
   source ~/.config/nvim/colors.vimrc