Fix various lints

autoload/matchup.vim

@@ -7,7 +7,7 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! matchup#init()
+function! matchup#init() abort
   call matchup#perf#tic('loading')
 
   call s:init_options()
@@ -293,7 +293,7 @@ function! s:snr()
 endfunction
 let s:sid = printf("\<SNR>%d_", s:snr())
 
-function! matchup#motion_sid()
+function! matchup#motion_sid() abort
   return s:sid
 endfunction
 

autoload/matchup/custom.vim

@@ -73,7 +73,7 @@ endfunction
 " [@opts] user data dict passed to function
 function! matchup#custom#define_motion(modes, keys, fcn, ...) abort
   if a:modes !~# '^[nox]\+$'
-    echoerr "invalid modes"
+    echoerr 'invalid modes'
   endif
 
   let s:custom_counter += 1

autoload/matchup/delim.vim

@@ -381,7 +381,7 @@ function! s:get_delim(opts) abort " {{{1
     let l:check_skip = get(a:opts, 'check_skip',
           \ g:matchup_delim_noskips >= 2
           \ || g:matchup_delim_noskips >= 1
-          \     && getline(line('.'))[l:cursorpos-1] =~ '[^[:punct:]]')
+          \     && getline(line('.'))[l:cursorpos-1] =~? '[^[:punct:]]')
     if l:check_skip && matchup#delim#skip(line('.'), l:cursorpos)
       return {}
     endif
@@ -440,7 +440,7 @@ function! s:get_delim(opts) abort " {{{1
     " in 'current' mode, but be explicit
     if a:opts.direction !=# 'current'
           \ && (l:check_skip || g:matchup_delim_noskips == 1
-          \     && getline(l:lnum)[l:cnum-1] =~ '[^[:punct:]]')
+          \     && getline(l:lnum)[l:cnum-1] =~? '[^[:punct:]]')
           \ && matchup#delim#skip(l:lnum, l:cnum)
           \ && (a:opts.direction ==# 'prev' ? (l:lnum > 1 || l:cnum > 1)
           \     : (l:lnum < line('$') || l:cnum < len(getline('$'))))

autoload/matchup/loader.vim

@@ -75,6 +75,7 @@ function! matchup#loader#refresh_match_words() abort " {{{1
 
     " protect the cursor from the match_words function
     let l:save_pos = matchup#pos#get_cursor()
+    let l:match_words = ''
     execute 'let l:match_words = ' b:match_words
     if l:save_pos != matchup#pos#get_cursor()
       call matchup#pos#set_cursor(l:save_pos)

autoload/matchup/text_obj.vim

@@ -68,8 +68,10 @@ function! matchup#text_obj#delimited(is_inner, visual, type) " {{{1
         call feedkeys("\<c-\>\<c-n>\<esc>", 'n')
 
         " and undo the text vim enters if necessary
+        " vint: -ProhibitUnnecessaryDoubleQuote
         call feedkeys(":call matchup#text_obj#undo("
               \ .undotree().seq_cur.")\<cr>:\<c-c>", 'n')
+        " vint: +ProhibitUnnecessaryDoubleQuote
       endif
       return
     endif

autoload/matchup/unmatchit.vim

@@ -8,7 +8,7 @@
 
 if !exists('g:loaded_matchup')
       \ || !exists('g:loaded_matchit')
-      \ || !exists(":MatchDebug")
+      \ || !exists(':MatchDebug')
   finish
 endif
 

autoload/matchup/util.vim

@@ -10,7 +10,7 @@ set cpo&vim
 function! matchup#util#command(cmd) " {{{1
   let l:lines = ''
   try
-    silent! redir => l:lines
+    execute 'silent! redir => l:lines'
       silent! execute a:cmd
     redir END
   finally

autoload/matchup/where.vim

@@ -115,8 +115,8 @@ endfunction
 
 function! matchup#where#print(args)
   let l:verbose = 0
-  if a:args =~ '!' || len(a:args) >= 2
-        \ || a:args =~ '?' && s:curpos == getcurpos()
+  if a:args =~? '!' || len(a:args) >= 2
+        \ || a:args =~? '?' && s:curpos == getcurpos()
     let l:verbose = 1
   endif
   let s:curpos = getcurpos()