[PATCH 4/3] shortlog: handle multi-line subjects like log --pretty=oneline et. al. do

["René Scharfe" <rene.scharfe@lsrfire.ath.cx>]

The commit message parser of git shortlog used to treat only the first
non-empty line of the commit message as the subject.  Other log commands
(e.g. --pretty=oneline) show the whole first paragraph instead (unwrapped
into a single line).

For consistency, this patch borrows format_subject() from pretty.c to
make shortlog do the same.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
---
 builtin-shortlog.c |    9 ++++++---
 pretty.c           |    4 ++--
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/builtin-shortlog.c b/builtin-shortlog.c
index d03f14f..e492906 100644
--- a/builtin-shortlog.c
+++ b/builtin-shortlog.c
@@ -29,6 +29,9 @@ static int compare_by_number(const void *a1, const void *a2)
 		return -1;
 }
 
+const char *format_subject(struct strbuf *sb, const char *msg,
+			   const char *line_separator);
+
 static void insert_one_record(struct shortlog *log,
 			      const char *author,
 			      const char *oneline)
@@ -41,6 +44,7 @@ static void insert_one_record(struct shortlog *log,
 	size_t len;
 	const char *eol;
 	const char *boemail, *eoemail;
+	struct strbuf subject = STRBUF_INIT;
 
 	boemail = strchr(author, '<');
 	if (!boemail)
@@ -89,9 +93,8 @@ static void insert_one_record(struct shortlog *log,
 	while (*oneline && isspace(*oneline) && *oneline != '\n')
 		oneline++;
 	len = eol - oneline;
-	while (len && isspace(oneline[len-1]))
-		len--;
-	buffer = xmemdupz(oneline, len);
+	format_subject(&subject, oneline, " ");
+	buffer = strbuf_detach(&subject, NULL);
 
 	if (dot3) {
 		int dot3len = strlen(dot3);
diff --git a/pretty.c b/pretty.c
index 343dca5..421d9c5 100644
--- a/pretty.c
+++ b/pretty.c
@@ -486,8 +486,8 @@ static void parse_commit_header(struct format_commit_context *context)
 	context->commit_header_parsed = 1;
 }
 
-static const char *format_subject(struct strbuf *sb, const char *msg,
-				  const char *line_separator)
+const char *format_subject(struct strbuf *sb, const char *msg,
+			   const char *line_separator)
 {
 	int first = 1;
 
-- 
1.6.1