Any other value is treated as a custom merge tool and requires
that a corresponding mergetool.<tool>.cmd variable is defined.
+merge.guitool::
+ Controls which merge tool is used by linkgit:git-mergetool[1] when the
+ -g/--gui flag is specified. The list below shows the valid built-in values.
+ Any other value is treated as a custom merge tool and requires that a
+ corresponding mergetool.<guitool>.cmd variable is defined.
+
include::mergetools-merge.txt[]
merge.verbosity::