Merge branch 'yn/checkout-doc-fix'

Doc fix.

* yn/checkout-doc-fix:
  checkout doc: fix an unmatched double-quote pair

Documentation/git-checkout.txt

@@ -289,7 +289,7 @@ section of linkgit:git-add[1] to learn how to operate the `--patch` mode.
 +
 You can use the `"@{-N}"` syntax to refer to the N-th last
 branch/commit checked out using "git checkout" operation. You may
-also specify `-` which is synonymous to `"@{-1}`.
+also specify `-` which is synonymous to `"@{-1}"`.
 +
 As a special case, you may use `"A...B"` as a shortcut for the
 merge base of `A` and `B` if there is exactly one merge base. You can