doc/git-log: move "-t" into diff-options list

The "-t" option is infrequently used; it doesn't deserve a spot near the
top of the options list. Let's push it down into the diff-options
include, near the definition of --raw.

We'll protect it with a git-log ifdef, since it doesn't make any sense
for non-tree diff commands. Note that this means it also shows up in
git-show, but that's a good thing; it applies equally well there.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/diff-options.txt

@@ -73,6 +73,11 @@ ifndef::git-format-patch[]
 	Synonym for `-p --raw`.
 endif::git-format-patch[]
 
+ifdef::git-log[]
+-t::
+	Show the tree objects in the diff output.
+endif::git-log[]
+
 --indent-heuristic::
 	Enable the heuristic that shifts diff hunk boundaries to make patches
 	easier to read. This is the default.

Documentation/git-log.txt

@@ -146,9 +146,6 @@ below can be used to show the changes made by each commit.
 	in that case, the output represents the changes the merge
 	brought _into_ the then-current branch.
 
--t::
-	Show the tree objects in the diff output.
-
 :git-log: 1
 include::diff-options.txt[]