pretty_print_commit(): do not append notes message

The only case pretty_print_commit() appends notes message to the log
message taken from the commit is when show_log() calls it with the
notes_message field set, and the output format is not the userformat
(i.e. when substituting "%N").  No other users of this function sets
this field in the pretty_print_context, as can be easily verified in
the previous step.

Hoist the code to append the notes message to the caller.

Up to this point, no functionality change is intended.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

log-tree.c

@@ -672,6 +672,9 @@ void show_log(struct rev_info *opt)
 	ctx.reflog_info = opt->reflog_info;
 	ctx.fmt = opt->commit_format;
 	pretty_print_commit(&ctx, commit, &msgbuf);
+	if ((ctx.fmt != CMIT_FMT_USERFORMAT) &&
+	    ctx.notes_message && *ctx.notes_message)
+		strbuf_addstr(&msgbuf, ctx.notes_message);
 
 	if (opt->add_signoff)
 		append_signoff(&msgbuf, opt->add_signoff);

pretty.c

@@ -1417,9 +1417,6 @@ void pretty_print_commit(const struct pretty_print_context *pp,
 	if (pp->fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
 		strbuf_addch(sb, '\n');
 
-	if (pp->notes_message && *pp->notes_message)
-		strbuf_addstr(sb, pp->notes_message);
-
 	free(reencoded);
 }