bpo-27597: [doc] Add TracebackException usage examples#19

Closed

iritkatriel wants to merge 3 commits intobpo-31299from

Commits on Jul 19, 2021

reword intro to the traceback tutorial to explain what TracebackException is for
iritkatriel
committed
use new API in print_exception/format_exception/format_exception_only examples
iritkatriel
committed
death --> life. Added TracebackException usage examples
iritkatriel
committed