builtin/commit.c: extract ignore_non_trailer() helper function

diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh
index 88fc407ed6aa96acd21eb249d10832fe3ff8723d..27263dfb80420a417bb0f33aa8731ef2fb7bc7b6 100755 (executable)
--- a/t/t9300-fast-import.sh
+++ b/t/t9300-fast-import.sh
@@ -12,7 +12,7 @@ test_description='test git fast-import utility'
 # This could be written as "head -c $1", but IRIX "head" does not
 # support the -c option.
 head_c () {
-       "$PERL_PATH" -e '
+       perl -e '
                my $len = $ARGV[1];
                while ($len > 0) {
                        my $s;