doc: convert git-stash, git tag and git worktree to synopis style

Documentation/config/stash.adoc

@@ -1,19 +1,28 @@
-stash.index::
+ifndef::git-stash[]
+:see-show: See the description of the 'show' command in linkgit:git-stash[1].
+endif::git-stash[]
+
+ifdef::git-stash[]
+:see-show:
+endif::git-stash[]
+
+`stash.index`::
 	If this is set to true, `git stash apply` and `git stash pop` will
-	behave as if `--index` was supplied. Defaults to false. See the
-	descriptions in linkgit:git-stash[1].
+	behave as if `--index` was supplied. Defaults to false.
+ifndef::git-stash[]
+See the descriptions in linkgit:git-stash[1].
+endif::git-stash[]
 
-stash.showIncludeUntracked::
+`stash.showIncludeUntracked`::
 	If this is set to true, the `git stash show` command will show
-	the untracked files of a stash entry.  Defaults to false. See
-	the description of the 'show' command in linkgit:git-stash[1].
+	the untracked files of a stash entry. Defaults to false. {see-show}
 
-stash.showPatch::
+`stash.showPatch`::
 	If this is set to true, the `git stash show` command without an
 	option will show the stash entry in patch form.  Defaults to false.
-	See the description of the 'show' command in linkgit:git-stash[1].
+	{see-show}
 
-stash.showStat::
+`stash.showStat`::
 	If this is set to true, the `git stash show` command without an
 	option will show a diffstat of the stash entry.  Defaults to true.
-	See the description of the 'show' command in linkgit:git-stash[1].
+	{see-show}

Documentation/config/tag.adoc

@@ -1,17 +1,23 @@
-tag.forceSignAnnotated::
+`tag.forceSignAnnotated`::
 	A boolean to specify whether annotated tags created should be GPG signed.
 	If `--annotate` is specified on the command line, it takes
 	precedence over this option.
 
-tag.sort::
-	This variable controls the sort ordering of tags when displayed by
-	linkgit:git-tag[1]. Without the "--sort=<value>" option provided, the
-	value of this variable will be used as the default.
+`tag.sort`::
+ifdef::git-tag[]
+This variable controls the sort ordering of tags when displayed by `git-tag`.
+endif::git-tag[]
+ifndef::git-tag[]
+This variable controls the sort ordering of tags when displayed by
+linkgit:git-tag[1].
+endif::git-tag[]
+Without the `--sort=<value>` option provided, the value of this variable will
+be used as the default.
 
-tag.gpgSign::
+`tag.gpgSign`::
 	A boolean to specify whether all tags should be GPG signed.
 	Use of this option when running in an automated script can
 	result in a large number of tags being signed. It is therefore
-	convenient to use an agent to avoid typing your gpg passphrase
+	convenient to use an agent to avoid typing your GPG passphrase
 	several times. Note that this option doesn't affect tag signing
-	behavior enabled by "-u <keyid>" or "--local-user=<keyid>" options.
+	behavior enabled by `-u <keyid>` or `--local-user=<keyid>` options.

Documentation/config/worktree.adoc

@@ -1,19 +1,19 @@
-worktree.guessRemote::
+`worktree.guessRemote`::
 	If no branch is specified and neither `-b` nor `-B` nor
 	`--detach` is used, then `git worktree add` defaults to
 	creating a new branch from HEAD.  If `worktree.guessRemote` is
 	set to true, `worktree add` tries to find a remote-tracking
 	branch whose name uniquely matches the new branch name.  If
 	such a branch exists, it is checked out and set as "upstream"
 	for the new branch.  If no such match can be found, it falls
-	back to creating a new branch from the current HEAD.
+	back to creating a new branch from the current `HEAD`.
 
-worktree.useRelativePaths::
-	Link worktrees using relative paths (when "true") or absolute
-	paths (when "false"). This is particularly useful for setups
+`worktree.useRelativePaths`::
+	Link worktrees using relative paths (when "`true`") or absolute
+	paths (when "`false`"). This is particularly useful for setups
 	where the repository and worktrees may be moved between
-	different locations or environments. Defaults to "false".
+	different locations or environments. Defaults to "`false`".
 +
-Note that setting `worktree.useRelativePaths` to "true" implies enabling the
+Note that setting `worktree.useRelativePaths` to "`true`" implies enabling the
 `extensions.relativeWorktrees` config (see linkgit:git-config[1]),
 thus making it incompatible with older versions of Git.