single line status updates with minimal update sequences
- Upd: a class accepting update strings which emits minimal test to update a progress line.
– out(s): update the line to show the string s
– nl(s): flush the output line, write s with a newline, restore the status line
– without(func,…): flush the output line, call func, restore the status line
This is available as an output mode in cs.logutils.