change vim script style from 4-space indent to 2-space

after/ftplugin/vim.vim

@@ -15,6 +15,11 @@ set foldmethod=expr foldlevel=0 foldlevelstart=-1
 " see `:h K` and https://stackoverflow.com/q/15867323/6064933
 set keywordprg=:help
 
+set tabstop=2       " number of visual spaces per TAB
+set softtabstop=2   " number of spaces in tab when editing
+set shiftwidth=2    " number of spaces to use for autoindent
+set expandtab       " expand tab to spaces so that tabs are spaces
+
 " Only define following variable if Auto-pairs plugin is used
 if &runtimepath =~? 'auto-pairs'
   let b:AutoPairs = AutoPairsDefine({'<' : '>'})

autocommands.vim

@@ -24,9 +24,7 @@ augroup END
 augroup resume_edit_position
   autocmd!
   autocmd BufReadPost *
-        \ if line("'\"") > 1 && line("'\"") <= line("$") && &ft !~# 'commit'
-        \ | execute "normal! g`\"zvzz"
-        \ | endif
+        \ if line("'\"") > 1 && line("'\"") <= line("$") && &ft !~# 'commit' | execute "normal! g`\"zvzz" | endif
 augroup END
 
 " Display a message when the current file is not in utf-8 format.
@@ -34,8 +32,7 @@ augroup END
 " https://github.com/vim/vim/issues/4379
 augroup non_utf8_file_warn
   autocmd!
-    autocmd BufRead * if &fileencoding != 'utf-8'
-                \ | unsilent echomsg 'File not in UTF-8 format!' | endif
+  autocmd BufRead * if &fileencoding != 'utf-8' | unsilent echomsg 'File not in UTF-8 format!' | endif
 augroup END
 
 " Automatically reload the file if it is changed outside of Nvim, see

plugins.vim

@@ -15,14 +15,12 @@ if g:is_win || g:is_mac
       echomsg 'Installing Vim-plug on your system'
       silent execute '!curl -fLo ' . g:VIM_PLUG_PATH . ' --create-dirs '
             \ . 'https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'
-
       augroup plug_init
           autocmd!
           autocmd VimEnter * PlugInstall --sync | quit |source $MYVIMRC
       augroup END
     else
-            echoerr 'Curl must be available to install vim-plug, or you may install '
-                    \ . 'vim-plug by yourself.'
+      echoerr 'Curl not available on your system, you may install vim-plug by yourself.'
       finish
     endif
   endif
@@ -753,8 +751,7 @@ if ( g:is_win || g:is_mac ) && executable('latex')
   if g:is_win
     let g:vimtex_view_general_viewer = 'SumatraPDF'
     let g:vimtex_view_general_options_latexmk = '-reuse-instance'
-        let g:vimtex_view_general_options
-            \ = '-reuse-instance -forward-search @tex @line @pdf'
+    let g:vimtex_view_general_options = '-reuse-instance -forward-search @tex @line @pdf'
   endif
 
   if g:is_mac