doc: restore: remove double underscore

69666e67 (doc: convert git-restore to new style format, 2025-01-10)
converted `A` to _<rev-A>__; the extra underscore was a mistake.

Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-restore.adoc

@@ -43,7 +43,7 @@ given, otherwise from the index.
 +
 As a special case, you may use `"<rev-A>...<rev-B>"` as a shortcut for the
 merge base of _<rev-A>_ and _<rev-B>_ if there is exactly one merge base. You can
-leave out at most one of _<rev-A>__ and _<rev-B>_, in which case it defaults to `HEAD`.
+leave out at most one of _<rev-A>_ and _<rev-B>_, in which case it defaults to `HEAD`.
 
 `-p`::
 `--patch`::