attempt to detect whether `meld` supports `--output`
	by inspecting the output of `meld --help`.  Configuring
	`mergetool.meld.hasOutput` will make Git skip these checks and
	use the configured value instead.  Setting `mergetool.meld.hasOutput`
	to `true` tells Git to unconditionally use the `--output` option,
	and `false` avoids using `--output`.

`mergetool.meld.useAutoMerge`::
	When the `--auto-merge` is given, meld will merge all non-conflicting
	parts automatically, highlight the conflicting parts, and wait for
	user decision.  Setting `mergetool.meld.useAutoMerge` to `true` tells
	Git to unconditionally use the `--auto-merge` option with `meld`.
	Setting this value to `auto` makes git detect whether `--auto-merge`
	is supported and will only use `--auto-merge` when available.  A
	value of `false` avoids using `--auto-merge` altogether, and is the
	default value.

`mergetool.<variant>.layout`::
	Configure the split window layout for vimdiff's _<variant>_, which is any of `vimdiff`,
	`nvimdiff`, `gvimdiff`.
	Upon launching `git mergetool` with `--tool=<variant>` (or without `--tool`
	if `merge.tool` is configured as _<variant>_), Git will consult
	`mergetool.<variant>.layout` to determine the tool's layout. If the
	variant-specific configuration is not available, `vimdiff` ' s is used as
	fallback.  If that too is not available, a default layout with 4 windows
	will be used.  To configure the layout, see the 'BACKEND SPECIFIC HINTS'
ifdef::git-mergetool[]
	section.
endif::[]
ifndef::git-mergetool[]
	section in linkgit:git-mergetool[1].
endif::[]

`mergetool.hideResolved`::
	During a merge, Git will automatically resolve as many conflicts as
	possible and write the `$MERGED` file containing conflict markers around
	any conflicts that it cannot resolve; `$LOCAL` and `$REMOTE` normally
	are the versions of the file from before Git`s conflict
	resolution. This flag causes `$LOCAL` and `$REMOTE` to be overwritten so
	that only the unresolved conflicts are presented to the merge tool. Can
	be configured per-tool via the `mergetool.<tool>.hideResolved`
	configuration variable. Defaults to `false`.

`mergetool.keepBackup`::
	After performing a merge, the original file with conflict markers
	can be saved as a file with a `.orig` extension.  If this variable
	is set to `false` then this file is not preserved.  Defaults to
	`true` (i.e. keep the backup files).

`mergetool.keepTemporaries`::
	When invoking a custom merge tool, Git uses a set of temporary
	files to pass to the tool. If the tool returns an error and this
	variable is set to `true`, then these temporary files will be
	preserved; otherwise, they will be removed after the tool has
	exited. Defaults to `false`.

`mergetool.writeToTemp`::
	Git writes temporary `BASE`, `LOCAL`, and `REMOTE` versions of
	conflicting files in the worktree by default.  Git will attempt
	to use a temporary directory for these files when set `true`.
	Defaults to `false`.

`mergetool.prompt`::
	Prompt before each invocation of the merge resolution program.

`mergetool.guiDefault`::
	Set `true` to use the `merge.guitool` by default (equivalent to
	specifying the `--gui` argument), or `auto` to select `merge.guitool`
	or `merge.tool` depending on the presence of a `DISPLAY` environment
	variable value. The default is `false`, where the `--gui` argument
	must be provided explicitly for the `merge.guitool` to be used.