Situation: 21 item input file of text lines, no symbols or spaces, no $IFS except standard line separator at end, no
lines over about 20 characters. Version of `pr` is 5.2.1
Results: right side column misalign sometimes (see when below). In these cases there is only a tab separator between the
columns.
When: problem exists on some terminal sessions and not others, i.e. tty1, etc. but not tty2, etc. A session that fails
is consistent, as is one that doesn't. Proved this by running same exact job from all tty's at the same time.
Clue: can be "fixed" by logoff/logon of a terminal session, and after problem
starts it is consistent.
Analysis: (1) matched environment variables (from `set`) for "good" and "bad" sessions, $TERM is only difference, (2)
`type` identifies same `pr` program, (3) cannot find "pr align" in your bug reports.
Thoughts: it is as if running some print option such as -W sets a permanent option flag (something) that is identified
by terminal but is not an environment variable output by `set`.
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