- special mart of the form #OMK@<snippet file name><EOL>. This mark
- is used for splitting Makefile.rules back to the original
- snippets.
-
+ special mark of the form #OMK@<snippet file name><EOL>. This mark
+ is used for splitting modified Makefile.rules back to the
+ original snippets. If <snippet file name> starts with __, it is
+ ignored during splitting.