fix style issues as per vint

after/ftplugin/markdown.vim

@@ -1,7 +1,7 @@
 set concealcursor=c
 set synmaxcol=3000  " For long Chinese paragraphs
 
-if exists(":FootnoteNumber")
+if exists(':FootnoteNumber')
     nnoremap <buffer> <Plug>AddVimFootnote :<c-u>call markdownfootnotes#VimFootnotes('i')<CR>
     inoremap <buffer> <Plug>AddVimFootnote <C-O>:<c-u>call markdownfootnotes#VimFootnotes('i')<CR>
 endif

after/ftplugin/vim.vim

@@ -20,5 +20,5 @@ if &runtimepath =~? 'auto-pairs'
     let b:AutoPairs = AutoPairsDefine({'<' : '>'})
 
     " Do not use `"` for vim script since `"` is also used for comment
-	let b:AutoPairs = {'(':')', '[':']', '{':'}', "'":"'", "`":"`", '<':'>'}
+    let b:AutoPairs = {'(':')', '[':']', '{':'}', "'":"'", '`':'`', '<':'>'}
 endif

autoload/utils.vim

@@ -79,9 +79,9 @@ endfunction
 function! utils#ToggleCursorCol() abort
     if &cursorcolumn
         set nocursorcolumn
-        echo "cursorcolumn: OFF"
+        echo 'cursorcolumn: OFF'
     else
         set cursorcolumn
-        echo "cursorcolumn: ON"
+        echo 'cursorcolumn: ON'
     endif
 endfunction

ftdetect/pdc.vim

@@ -1 +1,4 @@
+augroup det_md
+    autocmd!
     autocmd BufRead,BufNewFile *.pdc set filetype=markdown
+augroup END

options.vim

@@ -28,7 +28,7 @@ set noswapfile
 " Set up backup directory
 let g:backupdir=expand(stdpath('data') . '/backup')
 if !isdirectory(g:backupdir)
-   call mkdir(g:backupdir, "p")
+   call mkdir(g:backupdir, 'p')
 endif
 let &backupdir=g:backupdir
 

plugins.vim

@@ -1,3 +1,4 @@
+scriptencoding utf-8
 "{ Plugin installation
 "{{ Vim-plug Install and related settings
 
@@ -536,9 +537,9 @@ nnoremap <silent> <Space>t :TagbarToggle<CR>
 
 " Add support for markdown files in tagbar.
 if g:is_win
-    let g:md_ctags_bin=fnamemodify(g:nvim_config_root."\\tools\\markdown2ctags.exe", ":p")
+    let g:md_ctags_bin=fnamemodify(g:nvim_config_root."\\tools\\markdown2ctags.exe", ':p')
 else
-    let g:md_ctags_bin=fnamemodify(g:nvim_config_root."/tools/markdown2ctags.py", ":p")
+    let g:md_ctags_bin=fnamemodify(g:nvim_config_root.'/tools/markdown2ctags.py', ':p')
 endif
 
 let g:tagbar_type_markdown = {

ui.vim

@@ -4,7 +4,7 @@
 " support true colors! For a comprehensive list of terminals supporting true
 " colors, see https://github.com/termstandard/colors and
 " https://gist.github.com/XVilka/8346728.
-if $TERM == "xterm-256color" || exists('g:started_by_firenvim')
+if $TERM ==# 'xterm-256color' || exists('g:started_by_firenvim')
     set termguicolors
 endif
 " Use dark background