doc: add spacing around paginate options

Make the documentation page consistent with the usage string printed by
"git help git" and consistent with the description of "[-v | --version]"
option.

Signed-off-by: James Liu <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: disposedtrolley

Documentation/git.txt

@@ -11,7 +11,7 @@ SYNOPSIS
 [verse]
 'git' [-v | --version] [-h | --help] [-C <path>] [-c <name>=<value>]
     [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
-    [-p|--paginate|-P|--no-pager] [--no-replace-objects] [--no-lazy-fetch]
+    [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--no-lazy-fetch]
     [--no-optional-locks] [--bare] [--git-dir=<path>] [--work-tree=<path>]
     [--namespace=<name>] [--config-env=<name>=<envvar>] <command> [<args>]