* etags.c (Python_functions): Skip spaces at beginning of lines.

* etags.c (Python_functions): Skip spaces at beginning of lines.
(Python_functions, PHP_functions): Name tags, for ctags' sake.
(TeX_commands): Name tags.  Correction of old disabled code.

* etags.c (curfiledir, curtagfname): New global variables.
(process_file): Initialise them.
(readline): Canonicalize the name found in #line directive.