* lib/gdb.exp (gdb_test): Remove catch from around the send. The

	* lib/gdb.exp (gdb_test): Remove catch from around the send.  The
	code following the catch silently ignored some errors; without the
	catch they should be thrown like any other tcl error.  Also, the
	catch used "" instead of {} which meant all the callers who wanted
	to include one of the characters "[]$ had to quote it an extra time.
	* gdb.base/{callfuncs.exp,commands.exp,gdbvars.exp,printcmds.exp,
	ptype.exp,signals.exp,watchpoint.exp}, gdb.c++/{cplusfuncs.exp,
	demangle.exp}, gdb.chill/chexp.exp, gdb.fortran/exprs.exp:
	Remove extra quoting.