git help doc: use "<doc>" instead of "<guide>"

Replace the use of "<guide>" originally introduced (as "GUIDE") in
a133737 (doc: include --guide option description for "git help",
2013-04-02) with the more generic "<doc>". The "<doc>" placeholder is
more generic, and one we'll be able to use as we introduce new
documentation categories.

Let's also add "<doc>" to the "git help -h" output, when it was made
to use parse_option() in in 41eb33b (help: use parseopt,
2008-02-24).

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

Documentation/git-help.txt

@@ -9,14 +9,14 @@ SYNOPSIS
 --------
 [verse]
 'git help' [-a|--all] [--[no-]verbose] [--[no-]external-commands] [--[no-]aliases]
-'git help' [[-i|--info] [-m|--man] [-w|--web]] [<command>|<guide>]
+'git help' [[-i|--info] [-m|--man] [-w|--web]] [<command>|<doc>]
 'git help' [-g|--guides]
 'git help' [-c|--config]
 
 DESCRIPTION
 -----------
 
-With no options and no '<command>' or '<guide>' given, the synopsis of the 'git'
+With no options and no '<command>' or '<doc>' given, the synopsis of the 'git'
 command and a list of the most commonly used Git commands are printed
 on the standard output.
 
@@ -26,8 +26,8 @@ printed on the standard output.
 If the option `--guides` or `-g` is given, a list of the
 Git concept guides is also printed on the standard output.
 
-If a command, or a guide, is given, a manual page for that command or
-guide is brought up. The 'man' program is used by default for this
+If a command or other documentation is given, the relevant manual page
+will be brought up. The 'man' program is used by default for this
 purpose, but this can be overridden by other options or configuration
 variables.
 

builtin/help.c

@@ -81,7 +81,7 @@ static struct option builtin_help_options[] = {
 
 static const char * const builtin_help_usage[] = {
 	"git help [-a|--all] [--[no-]verbose]] [--[no-]external-commands] [--[no-]aliases]",
-	N_("git help [[-i|--info] [-m|--man] [-w|--web]] [<command>]"),
+	N_("git help [[-i|--info] [-m|--man] [-w|--web]] [<command>|<doc>]"),
 	"git help [-g|--guides]",
 	"git help [-c|--config]",
 	NULL