I would like to make some modification to the code of this plugin.

It adds / changes some default keybindings. Among them are <C-b> and <C-f> which move the cursor one character to the left / right.

The problem is they break the undo sequence, because they are mapped to <Left> and <Right>. The solution is to prefix them with <C-g>U.

However, I don't know in which version and which patch <C-g>U appeared in Vim.

I tried :helpgrep CTRL-G.*U which gave me 5 results in the quickfix list, but none of them gave me the info.

So I have 2 questions:

  • How can I find precisely when <C-g>U appeared in Vim?
  • How can I reliably test in a script if vim supports it?

Let's say I find out that <C-g>U appeared in Vim 7.4.567, would the following line be the proper way to test?:

if v:version > 704 || v:version == 704 && has("patch567")
  • 2
    I use if (v:version == 704 && has("patch393")) || v:version > 704 with set renderoptions and seems to work pretty well.
    – VanLaser
    Jan 6, 2016 at 20:55
  • 1
    For the 1st issue, i used Google :D groups.google.com/forum/#!topic/vim_dev/uZbngIYTl5M
    – VanLaser
    Jan 6, 2016 at 20:57
  • 1
    Thank you very much! So I just need to find out when <C-g>U was added...
    – saginaw
    Jan 6, 2016 at 20:58
  • 1
    Ah ok so it was in patch 849, thank you very much again. If you post it as an answer I'll accept it. Could you briefly explain how you found it on vim_dev ? I'm not used to this site.
    – saginaw
    Jan 6, 2016 at 21:00
  • 1
    romainl's answer is ok - i just used quoted text from the relevant vim's help section to search on google.
    – VanLaser
    Jan 6, 2016 at 21:02

2 Answers 2


You can find all the patches on Vim's FTP server. <C-g>U was added in patch 7.4.849.


I simply use has('patch-7.4.849') in lh-brackets. This is enough.

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