cs-upd 20170903

Single line status updates with minimal update sequences.

• Upd: a class accepting update strings which emits minimal text 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.