Re: [PATCH v9 5/5] help: respect new common command grouping

> 'git help' shows common commands in alphabetical order:
> 
> The most commonly used git commands are:
>    add        Add file contents to the index
>    bisect     Find by binary search the change that introduced a bug
>    branch     List, create, or delete branches
>    checkout   Checkout a branch or paths to the working tree
>    clone      Clone a repository into a new directory
>    commit     Record changes to the repository
>    [...]
> 
> without any indication of how commands relate to high-level
> concepts or each other. Revise the output to explain their relationship
> with the typical Git workflow:
> 
> These are common Git commands used in various situations:
> 
> start a working area (see also: git help tutorial)
>    clone      Clone a repository into a new directory
>    init       Create an empty Git repository or reinitialize [...]
> 
> work on the current change (see also: git help everyday)
>    add        Add file contents to the index
>    reset      Reset current HEAD to the specified state
> 
> examine the history and state (see also: git help revisions)
>    log        Show commit logs
>    status     Show the working tree status
> 
>    [...]
> 
> Helped-by: Eric Sunshine <sunshine@sunshineco.com>
> Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>

> Signed-off-by: Sébastien Guimmara <sebastien.guimmara@gmail.com>
> ---
>  help.c | 24 +++++++++++++++++++++++-
>  1 file changed, 23 insertions(+), 1 deletion(-)
> 
> diff --git a/help.c b/help.c
> index 2072a87..8f72051 100644
> --- a/help.c
> +++ b/help.c
> @@ -218,17 +218,39 @@ void list_commands(unsigned int colopts,
>  	}
>  }
>  
> +static int cmd_group_cmp(const void *elem1, const void *elem2)
> +{
> +	const struct cmdname_help *e1 = elem1;
> +	const struct cmdname_help *e2 = elem2;
> +
> +	if (e1->group < e2->group)
> +		return -1;
> +	if (e1->group > e2->group)
> +		return 1;
> +	return strcmp(e1->name, e2->name);
> +}
> +
>  void list_common_cmds_help(void)
>  {
>  	int i, longest = 0;
> +	int current_grp = -1;
>  
>  	for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
>  		if (longest < strlen(common_cmds[i].name))
>  			longest = strlen(common_cmds[i].name);
>  	}
>  
> -	puts(_("The most commonly used git commands are:"));
> +	qsort(common_cmds, ARRAY_SIZE(common_cmds),
> +		sizeof(common_cmds[0]), cmd_group_cmp);
> +
> +	puts(_("These are common Git commands used in various situations:"));
> +
>  	for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
> +		if (common_cmds[i].group != current_grp) {
> +			printf("\n%s\n", _(common_cmd_groups[common_cmds[i].group]));
> +			current_grp = common_cmds[i].group;
> +		}
> +
>  		printf("   %s   ", common_cmds[i].name);
>  		mput_char(' ', longest - strlen(common_cmds[i].name));
>  		puts(_(common_cmds[i].help));
>