* completer.c (gdb_completer_loc_break_characters): New variable.

	* completer.c (gdb_completer_loc_break_characters): New variable.
	(line_completion_function): If we are completing on locations,
	back up the start of word pointer past all characters which can
	appear in a location spec.
	(location_completer): New function.

	* completer.h: Add prototype for location_completer.

	* symtab.c (make_source_files_completion_list)
	(add_filename_to_list, not_interesting_fname): New functions.
	(filename_seen): New function, body extracted from
	output_source_filename.
	(output_source_filename): Call filename_seen to check if the file
	was already printed.
	(make_symbol_completion_list): If TEXT includes a
	double-quoted string, return an empty list, not NULL.
	(make_file_symbol_completion_list): New function, similar to
	make_symbol_completion_list but with an additional argument
	SRCFILE.

	* symtab.h (make_file_symbol_completion_list)
	(make_source_files_completion_list): Add prototypes.

	* breakpoint.c (_initialize_breakpoint): Make location_completer
	be the completion function for all commands which set breakpoints
	and watchpoints.
	(top-level): #include "completer.h".

	* tracepoint.c (_initialize_tracepoint): Make location_completer
	be the completion function for the "trace" command.
	(top-level): #include "completer.h".

	* printcmd.c (_initialize_printcmd): Make location_completer be
	the completion function for the "print", "inspect", "call", and
	"disassemble" commands.
	(top-level): #include "completer.h".

	* infcmd.c (_initialize_infcmd): Make location_completer be the
	completion function for the "go", "jump", and "until" commands.
	(top-level): #include "completer.h".