[Outreachy PATCH v2] checkout: use Q_() for messages with counts

Two messages in builtin/checkout.c show a count but are marked with a plain _(), so translators can only give a single form for them:

- " ... and %d more." at the end of the list of orphaned
  commits left behind when leaving a detached HEAD, and

- "only one reference expected, %d given." when more than
  one reference is given before "--".

Use Q_() for both. Translators of a language that phrases "2 more" and "3 more" the same way now have to translate these messages twice. At that cost, however, we help translators of languages that need to phrase "2 more", "3 more", and "5 more" differently.

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Tanga Joris <tangajoris@gmail.com>
---
Changes since v1:
 - Replaced the last sentence of the log message with
   a better explanation of the trade-off.
 - Also converted "only one reference expected, %d given.",
   as discussed by Tuomas in Mudi's thread.

Interdiff against v1:
  diff --git a/builtin/checkout.c b/builtin/checkout.c
  index 49239f029f..91b7c52396 100644
  --- a/builtin/checkout.c
  +++ b/builtin/checkout.c
  @@ -1491,7 +1491,9 @@ static int parse_branchname_arg(int argc, const char **argv,
   	else if (dash_dash_pos == 1)
   		has_dash_dash = 1; /* case (3) or (1) */
   	else if (dash_dash_pos >= 2)
  -		die(_("only one reference expected, %d given."), dash_dash_pos);
  +		die(Q_("only one reference expected, %d given.",
  +		       "only one reference expected, %d given.",
  +		       dash_dash_pos), dash_dash_pos);
   	opts->count_checkout_paths = !opts->quiet && !has_dash_dash;
   
   	if (!strcmp(arg, "-"))

 builtin/checkout.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)