docs: Add more info to ignore revs

Author: jubalh

CONTRIBUTING.md

@@ -57,7 +57,7 @@ We will then pull from your repository and merge manually.
 ## Hints and Pitfalls
 
 * When adding a new hotkey/shortcut make sure it's not registered in Profanity already. And also that it's not a default shortcut of readline.
-* We ship a `.git-blame-ignore-revs` file containing banal commits which you will most likely want to ignore when using `git blame`. In case you are using vim and [fugitive](https://github.com/tpope/vim-fugitive) `command Gblame Git blame --ignore-revs-file=.git-blame-ignore-revs` might be helpful in your vimrc.
+* We ship a `.git-blame-ignore-revs` file containing banal commits which you will most likely want to ignore when using `git blame`. In case you are using vim and [fugitive](https://github.com/tpope/vim-fugitive) `command Gblame Git blame --ignore-revs-file=.git-blame-ignore-revs` might be helpful in your vimrc. You can also set the `blame.ignoreRevsFile` option in your git config to have `git blame` generally ignore the listed commits.
 
 ## Coding style
 Follow the style already present ;-)