value of `false` avoids using `--auto-merge` altogether, and is the
default value.
+mergetool.vimdiff.layout::
+ The vimdiff backend uses this variable to control how its split
+ windows look like. Applies even if you are using Neovim (`nvim`) or
+ gVim (`gvim`) as the merge tool. See BACKEND SPECIFIC HINTS section
+ifndef::git-mergetool[]
+ in linkgit:git-mergetool[1].
+endif::[]
+ for details.
+
mergetool.hideResolved::
During a merge Git will automatically resolve as many conflicts as
possible and write the 'MERGED' file containing conflict markers around