cwatch: showing changed COBOL variable
further improvement for #55 (closed), the only way to improve it more is to subclass gdb.Breakpoint which will be done post-4.26
The improvement in 4.26 now includes:
- shows the COBOL expression (along to the memory area) watched
- always keeps the frame to COBOL (not somewhere in the libc internals)
- COBOL expression is visible in
info break