Change some =head1 to apidoc_section lines

apidoc_section is slightly favored over head1, as it is known only to
autodoc, and can't be confused with real pod.

1 files changed, 1 insertions, 1 deletions

diff --git a/pp_pack.c b/pp_pack.c
index 53d63f9d9e..195c7eaf77 100644
--- a/pp_pack.c
+++ b/pp_pack.c
@@ -804,7 +804,7 @@ first_symbol(const char *pat, const char *patend) {
 
 /*
 
-=head1 Pack and Unpack
+=for apidoc_section Pack and Unpack
 
 =for apidoc unpackstring