nvim: init.vim: Cleanup autocmd groups

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>

nvim/init.vim

@@ -325,7 +325,7 @@ command! -bang -nargs=* GGrep
   \   fzf#vim#with_preview({'dir': systemlist('git rev-parse --show-toplevel')[0]}), <bang>0)
 
 " --------------------------- Autocmd groups ---------------------------------
-augroup HaskellMaps
+augroup haskell_maps
     au!
 	au FileType haskell nmap <Leader>ht  :NeomakeSh stack exec -- fast-tags -R .<CR>
 	au FileType haskell nmap <Leader>hg  :Ghcid<CR>
@@ -335,7 +335,7 @@ augroup HaskellMaps
 	au FileType haskell nmap <Leader>hi  :exe ':HoogleInfo ' . expand('<cword>')<CR>
 augroup END
 
-augroup CMaps
+augroup c_maps
 	au!
 	au FileType c nmap <Leader>ct :NeomakeSh ctags -R .<CR>
 	au FileType c nmap <Leader>cu :NeomakeSh cscope -bqR<CR>
@@ -362,7 +362,7 @@ augroup CMaps
 	au FileType c nmap <silent> <Leader><Leader>sa :call CscopeQuery("a")<CR>
 augroup END
 
-augroup deopleteMaps
+augroup rust_maps
 	au!
 	au FileType rust nmap <buffer> <Leader>rd <plug>DeopleteRustGoToDefinitionDefault
 	au FileType rust nmap <buffer> <Leader>rc <plug>DeopleteRustShowDocumentation
@@ -376,22 +376,25 @@ augroup rainbow_lisp
 	autocmd FileType lisp,clojure,scheme RainbowParentheses
 augroup END
 
+augroup scheme_maps
+	au!
 	" Starts the REPL.
 	autocmd FileType scheme nnoremap <buffer> <Leader>rc :SchemeConnect<cr>
 	" Evaluates the outer most / top level form and jumps the cursor back to where it was.
 	autocmd FileType scheme nnoremap <buffer> <Leader>re :normal mscpaF<cr>`s
 	" Evaluates the entire file.
 	autocmd FileType scheme nnoremap <buffer> <Leader>rf :normal msggcpG<cr>`s
+augroup END
 
 " Toggles search highlighting off/on according to current mode. Source: http://blog.sanctum.geek.nz/vim-search-highlighting/
-augroup ToggleSearchHighlighting
+augroup toggle_search
 	autocmd!
 	autocmd InsertEnter * setlocal nohlsearch
 	autocmd InsertLeave * setlocal hlsearch
 augroup END
 
 " Close QF window if it is last window
-augroup QFClose
+augroup quickfix_close
 	au!
 	au WinEnter * if winnr('$') == 1 && &buftype == "quickfix"|q|endif
 augroup END
@@ -406,32 +409,33 @@ au QuitPre *.rs let s:quitting = 1
 au BufEnter *.rs let s:quitting = 0
 au BufWritePost *.rs if ! s:quitting | Neomake | else | echom "Neomake disabled"| endif
 
-augroup Terminal
+augroup terminal_job
 	au!
 	au TermOpen * setlocal statusline=%{b:terminal_job_id}
 augroup END
 
-" Default indentations
+augroup indentation_defaults
-autocmd BufRead,BufNewFile */gst-*/*.[ch] set et sw=2
+	au!
-autocmd BufRead,BufNewFile */gstreamer-*/*.[ch] set et sw=2
-autocmd BufRead,BufNewFile */pulseaudio/*.[ch] set et sw=4 tw=128
-" Configure expanding of tabs for various file types
 	au BufRead,BufNewFile *.c set noexpandtab
 	au BufRead,BufNewFile *.h set noexpandtab
 	au BufRead,BufNewFile Makefile* set noexpandtab
 	au BufNewFile,BufRead *.vim setlocal noet ts=4 sw=4 sts=4
 	au BufNewFile,BufRead *.txt setlocal noet ts=4 sw=4
-" Lua settings
 	autocmd BufNewFile,BufRead *.lua setlocal noet ts=4 sw=4 sts=4
-" Python indent
 	autocmd BufNewFile,BufRead *.py setlocal tabstop=4 softtabstop=4 shiftwidth=4 textwidth=80 smarttab expandtab
-" Shell/config/systemd settings
 	autocmd FileType fstab,systemd set noexpandtab
 	autocmd FileType gitconfig,sh,toml set noexpandtab
-" Spell check for git commits
+	autocmd BufRead,BufNewFile */gst-*/*.[ch] set et sw=2
+	autocmd BufRead,BufNewFile */gstreamer-*/*.[ch] set et sw=2
+	autocmd BufRead,BufNewFile */pulseaudio/*.[ch] set et sw=4 tw=128
+augroup END
+
+augroup spell_check
+	au!
 	autocmd FileType gitcommit setlocal spell
-" Spell Checking
 	autocmd BufRead,BufNewFile *.md,*.txt setlocal spell spelllang=en_uk
+augroup END
+
 " Automatically resize the window
 autocmd VimResized * wincmd =