Fix shm/hash to insert {##} for c2hs
Tweak shm-auto-insert-if to support different template styles
Fix shm-test customizations configuration
Add shm-auto-insert-if tests
Fix shm-insert-char-surrounding-with-spaces at beginning and end of buffer
Ignore errors when getting current node in shm-insert-del.el, add delete-char fallback for shm/delete