Update

ftplugin/bicep.vim

@@ -0,0 +1,21 @@
+if polyglot#init#is_disabled(expand('<sfile>:p'), 'bicep', 'ftplugin/bicep.vim')
+  finish
+endif
+
+" bicep.vim - basic bicep integration
+" Maintainer: Carl Smedstad <carl.smedstad at protonmail dot com>
+
+if exists('b:did_ftplugin') || v:version < 700 || &compatible
+  finish
+endif
+let b:did_ftplugin = 1
+
+let s:cpo_save = &cpoptions
+set cpoptions&vim
+
+" Set the commentstring
+setlocal commentstring=//%s
+let b:undo_ftplugin = ' commentstring<'
+
+let &cpoptions = s:cpo_save
+unlet s:cpo_save

ftplugin/rst.vim

@@ -22,7 +22,7 @@ if !exists('g:rst_fold_enabled')
   let g:rst_fold_enabled = 0
 endif
 
-let b:undo_ftplugin = "setl com< cms< et< fo<"
+let b:undo_ftplugin = "setlocal comments< commentstring< expandtab< formatoptions<"
 
 setlocal comments=fb:.. commentstring=..\ %s expandtab
 setlocal formatoptions+=tcroql
@@ -36,6 +36,7 @@ setlocal formatoptions+=tcroql
 
 if exists("g:rst_style") && g:rst_style != 0
     setlocal expandtab shiftwidth=3 softtabstop=3 tabstop=8
+    let b:undo_ftplugin .= " | setlocal softtabstop< shiftwidth< tabstop<"
 endif
 
 if g:rst_fold_enabled != 0 && has('patch-7.3.867')  " Introduced the TextChanged event.
@@ -45,6 +46,7 @@ if g:rst_fold_enabled != 0 && has('patch-7.3.867')  " Introduced the TextChanged
   augroup RstFold
     autocmd TextChanged,InsertLeave <buffer> unlet! b:RstFoldCache
   augroup END
+  let b:undo_ftplugin .= " | setlocal foldexpr< foldmethod< foldtext<"
 endif
 
 let &cpo = s:cpo_save

ftplugin/ruby.vim

@@ -56,7 +56,7 @@ endif
 " TODO:
 "setlocal define=^\\s*def
 
-setlocal comments=:#
+setlocal comments=b:#
 setlocal commentstring=#\ %s
 
 if !exists('g:ruby_version_paths')