[chapel-lang/chapel] Change full '====' lines into ones that mix text

Branch: refs/heads/master
Revision: 00fce96
Author: bradcray
Log Message:

Merge pull request #16222 from bradcray/avoid-discourse-truncation

Change full ‘====’ lines into ones that mix text

[reviewed by @ronawho]

Discourse truncates messages when it finds lines that are full
of ASCII separator characters (most types of punctuation), but
preserves ones that mix text in. You can read more about this
in a question I posed about it here:

This PR changes any lines that are all ‘====’ characters to
introduce text such that our script-generated messages won’t
be truncated prematurely.

Modified Files:
M util/cron/lookForTabs.cron
M util/cron/nightlysubs.pm
M util/pastPerformance/getoldperf
M util/tokencount/tokctnightly

Compare: https://github.com/chapel-lang/chapel/compare/563c9c115899...00fce966a372