Merge branch 'release/v0.52.0'v0.52.0

* release/v0.52.0:
  Bump VERSION
  Use proper version test for 'fo' j
  Check for +unix before binding date commands
  Correct Mutt filename pattern
  Add Ruby shebang
  Don't require num suffix to Python shebang word
  Accept "5" as suffix to Perl shebang word
  Add TCL shebang handling
  Lots of extension to filetype.vim
  Rename terminfo files to *.ti extension
  Add .wgetrc Vim filetype
  Add crontab(5) Vim filetype
  Apply t_cm hack to Makefile Vim invocation

1 files changed, 11 insertions, 6 deletions

diff --git a/vim/vimrc b/vim/vimrc
index 2919d930..185df60d 100644
--- a/vim/vimrc
+++ b/vim/vimrc
@@ -85,10 +85,13 @@ if has('cmdline_info')
 
 endif
 
-" \d inserts the current local date from date(1)
-nnoremap <silent> <Leader>d :<C-U>read !date<CR>
-" \D inserts the current UTC date from date(1)
-nnoremap <silent> <Leader>D :<C-U>read !date -u<CR>
+" Current date and time insertion commands, requiring POSIX date(1)
+if has('unix')
+  " \d: Local
+  nnoremap <silent> <Leader>d :<C-U>read !date<CR>
+  " \D: UTC
+  nnoremap <silent> <Leader>D :<C-U>read !date -u<CR>
+endif
 
 " Don't try to complete strings from included files, just use the strings in
 " the open buffers; I'll open the file if I want to complete from it
@@ -182,8 +185,10 @@ nnoremap <silent> ZA :<C-U>wall!<CR>
 set nrformats-=octal
 
 " Try to set the 'j' flag for 'formatoptions', to automatically delete comment
-" leaders when joining lines
-silent! set formatoptions+=j
+" leaders when joining lines, if supported
+if v:version >= 704 || v:version == 703 && has('patch541')
+  set formatoptions+=j
+endif
 
 " \f shows the current formatoptions at a glance
 nnoremap <silent> <Leader>f :<C-U>setlocal formatoptions?<CR>