gud with pdb (python) fails to set breakpoint on files other than the main module

["Adam Hupp" <adam@hupp.org>]

When using pdb in emacs (via gud), setting a breakpoint on a file
other than the main module causes the breakpoint to be added to main
module at that line instead of the current module.

Reproduce:

1) Run M-x pdb on a script A.py that imports another module B.py
2) Open B.py and add a breakpoint.  The breakpoint is added at that
line in A.py.

The problem is that the 'break' command does not specify the current file:

  (gud-def gud-break  "break %l"  "\C-b" "Set breakpoint at current line.")

should be:

  (gud-def gud-break  "break %f:%l"  "\C-b" "Set breakpoint at current line.")

Note the addition of the '%f" specifier.

-- 
Adam Hupp | http://hupp.org/adam/