diff --git a/runtime/ftplugin/ruby.vim b/runtime/ftplugin/ruby.vim
index 4a476fd..8c1f477 100644
--- a/runtime/ftplugin/ruby.vim
+++ b/runtime/ftplugin/ruby.vim
@@ -3,7 +3,7 @@
 " Maintainer:		Tim Pope <vimNOSPAM@tpope.org>
 " URL:			https://github.com/vim-ruby/vim-ruby
 " Release Coordinator:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:		2020 Feb 13
+" Last Change:		2022 Mar 21
 
 if (exists("b:did_ftplugin"))
   finish
@@ -53,7 +53,7 @@
 " TODO:
 "setlocal define=^\\s*def
 
-setlocal comments=:#
+setlocal comments=b:#
 setlocal commentstring=#\ %s
 
 if !exists('g:ruby_version_paths')
@@ -87,8 +87,14 @@
 
 function! s:build_path(path) abort
   let path = join(map(copy(a:path), 'v:val ==# "." ? "" : v:val'), ',')
-  if &g:path !~# '\v^%(\.,)=%(/%(usr|emx)/include,)=,$'
-    let path = substitute(&g:path,',,$',',','') . ',' . path
+  if &g:path =~# '\v^%(\.,)=%(/%(usr|emx)/include,)=,$'
+    let path = path . ',.,,'
+  elseif &g:path =~# ',\.,,$'
+    let path = &g:path[0:-4] . path . ',.,,'
+  elseif &g:path =~# ',,$'
+    let path = &g:path[0:-2] . path . ',,'
+  else
+    let path = substitute(&g:path, '[^,]\zs$', ',', '') . path
   endif
   return path
 endfunction
@@ -164,6 +170,8 @@
 if !exists("g:no_plugin_maps") && !exists("g:no_ruby_maps")
   nmap <buffer><script> <SID>:  :<C-U>
   nmap <buffer><script> <SID>c: :<C-U><C-R>=v:count ? v:count : ''<CR>
+  cmap <buffer> <SID><cfile> <Plug><cfile>
+  cmap <buffer> <SID><ctag>  <Plug><ctag>
 
   nnoremap <silent> <buffer> [m :<C-U>call <SID>searchsyn('\<def\>',['rubyDefine'],'b','n')<CR>
   nnoremap <silent> <buffer> ]m :<C-U>call <SID>searchsyn('\<def\>',['rubyDefine'],'','n')<CR>
@@ -210,20 +218,20 @@
   call s:map('c', '', '<C-R><C-F> <Plug><cfile>')
 
   cmap <buffer><script><expr> <SID>tagzv &foldopen =~# 'tag' ? '<Bar>norm! zv' : ''
-  call s:map('n', '<silent>', '<C-]>       <SID>:exe  v:count1."tag <Plug><ctag>"<SID>tagzv<CR>')
-  call s:map('n', '<silent>', 'g<C-]>      <SID>:exe         "tjump <Plug><ctag>"<SID>tagzv<CR>')
-  call s:map('n', '<silent>', 'g]          <SID>:exe       "tselect <Plug><ctag>"<SID>tagzv<CR>')
-  call s:map('n', '<silent>', '<C-W>]      <SID>:exe v:count1."stag <Plug><ctag>"<SID>tagzv<CR>')
-  call s:map('n', '<silent>', '<C-W><C-]>  <SID>:exe v:count1."stag <Plug><ctag>"<SID>tagzv<CR>')
-  call s:map('n', '<silent>', '<C-W>g<C-]> <SID>:exe        "stjump <Plug><ctag>"<SID>tagzv<CR>')
-  call s:map('n', '<silent>', '<C-W>g]     <SID>:exe      "stselect <Plug><ctag>"<SID>tagzv<CR>')
-  call s:map('n', '<silent>', '<C-W>}      <SID>:exe v:count1."ptag <Plug><ctag>"<CR>')
-  call s:map('n', '<silent>', '<C-W>g}     <SID>:exe        "ptjump <Plug><ctag>"<CR>')
+  call s:map('n', '<script><silent>', '<C-]>       <SID>:exe  v:count1."tag <SID><ctag>"<SID>tagzv<CR>')
+  call s:map('n', '<script><silent>', 'g<C-]>      <SID>:exe         "tjump <SID><ctag>"<SID>tagzv<CR>')
+  call s:map('n', '<script><silent>', 'g]          <SID>:exe       "tselect <SID><ctag>"<SID>tagzv<CR>')
+  call s:map('n', '<script><silent>', '<C-W>]      <SID>:exe v:count1."stag <SID><ctag>"<SID>tagzv<CR>')
+  call s:map('n', '<script><silent>', '<C-W><C-]>  <SID>:exe v:count1."stag <SID><ctag>"<SID>tagzv<CR>')
+  call s:map('n', '<script><silent>', '<C-W>g<C-]> <SID>:exe        "stjump <SID><ctag>"<SID>tagzv<CR>')
+  call s:map('n', '<script><silent>', '<C-W>g]     <SID>:exe      "stselect <SID><ctag>"<SID>tagzv<CR>')
+  call s:map('n', '<script><silent>', '<C-W>}      <SID>:exe v:count1."ptag <SID><ctag>"<CR>')
+  call s:map('n', '<script><silent>', '<C-W>g}     <SID>:exe        "ptjump <SID><ctag>"<CR>')
 
-  call s:map('n', '<silent>', 'gf           <SID>c:find <Plug><cfile><CR>')
-  call s:map('n', '<silent>', '<C-W>f      <SID>c:sfind <Plug><cfile><CR>')
-  call s:map('n', '<silent>', '<C-W><C-F>  <SID>c:sfind <Plug><cfile><CR>')
-  call s:map('n', '<silent>', '<C-W>gf   <SID>c:tabfind <Plug><cfile><CR>')
+  call s:map('n', '<script><silent>', 'gf           <SID>c:find <SID><cfile><CR>')
+  call s:map('n', '<script><silent>', '<C-W>f      <SID>c:sfind <SID><cfile><CR>')
+  call s:map('n', '<script><silent>', '<C-W><C-F>  <SID>c:sfind <SID><cfile><CR>')
+  call s:map('n', '<script><silent>', '<C-W>gf   <SID>c:tabfind <SID><cfile><CR>')
 endif
 
 let &cpo = s:cpo_save