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* Let roff_getname() end the roff identifier at a tab characterIngo Schwarze2019-02-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | and audit all its callers whether termination is handled correctly. Resulting improvements: * An escape or tab ending the macro name in a macro invocation is discarded, and argument processing is started after it. * An escape or tab ending a name in ".if d" and ".if r" is preserved. * An escape ending a name in ".ds" causes the whole request to be ignored. * A tab ending a name in ".ds" becomes part of the string. * An escape or tab ending a name in ".rm" causes the rest of the line to be ignored. * An escape or tab ending the first name in ".als", ".rn", or ".nr" causes the whole request to be ignored. Kurt Jaeger <pi at FreeBSD> made me aware of https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235456#c0 and in that bug report, comment 0 item (3) is a special case of this class of issues. Yes, the "mh" manual pages are no doubt among the worst on the planet.
* Two new low-level roff(7) features:Ingo Schwarze2018-04-101-1/+1
| | | | | | * .nr optional third argument (auto-increment step size) * \n+ and \n- numerical register auto-increment and -decrement bentley@ reported on Dec 9, 2013 that lang/sbcl(1) uses these.
* When accessing an undefined number register, define it to be zero, likeIngo Schwarze2018-04-091-1/+1
| | | | | | the previous commit for strings and macros, only technically simpler. Desired behaviour also mentioned by Werner Lemberg in 2011. This diff adds functionality but is -21 +19 LOC. :-)
* Finally port the OpenBSD regression suite.Ingo Schwarze2017-02-081-0/+6
Both kristaps@ and wiz@ repeated asked for this, literally for years.