run_all.py: run tests for each output format
run_all.py: run tests for each output format

For each format extension ('text' and 'html'), run each test for each
output format that has an expected output file.

For example, if the following files exist:

    t0001-whatever.in
    t0001-whatever.html
    t0001-whatever.text
    t0002-other.in
    t0002-other.text
    t0003-third.in
    t0003-third.html

The following tests will be run:

    command-line                        | expected output file
    ------------------------------------+--------------------------
    vt100.py t0001-whatever.in -f html  | t0001-whatever.html
    vt100.py t0001-whatever.in -f text  | t0001-whatever.text
    vt100.py t0002-other.in -f text     | t0002-other.text
    vt100.py t0003-third.in -f html     | t0003-third.html

MarkLodato/vt100-parser,MarkLodato/vt100-parser