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* Surprisingly, every escape sequence can also be used as an argumentIngo Schwarze2022-06-081-2/+48
| | | | | | | delimiter for an outer escape sequence, in which case the delimiting escape sequence retains its syntax but usually ignores its argument and loses its inherent effect. Add rudimentary support for this syntax quirk in order to improve parsing compatibility with groff.
* Split the excessively generic diagnostic message "invalid escape sequence"Ingo Schwarze2022-06-071-1/+1
| | | | | into the more specific messages "invalid escape argument delimiter" and "invalid escape sequence argument".
* Messages of the -Wbase level now print STYLE:. Since thisIngo Schwarze2017-07-041-1/+1
| | | | | | | | causes horrible churn anyway, profit of the opportunity to stop excessive testing, such that this is hopefully the last instance of such churn. Consistently use OpenBSD RCS tags, blank .Os, blank fourth .TH argument, and Mdocdate like everywhere else. Use -Ios=OpenBSD for platform-independent predictable output.
* let \l use the right fill characterIngo Schwarze2017-06-141-0/+16