On Sunday 27 May 2018 21:58:07 Ingo Schwarze wrote: > > Happens for: man -Tps and man -Tdvi > > Regarding -Tps, i don't know what you mean.
Ok, I would try to explain it a bit more... > As far as i understand, > at least the default font for -Tps does not even contain a > hyphen-minus output glyph. Now I looked deeply at man -Tps output and basically \- sequence is written as character 0xAD (\255 in octet) into output postscript file. Therefore it is SOFT HYPHEN (U+00AD), so it is incorrect for command line switch. Converting this postscript file to PDF (via ps2pdf) converts that SOFT HYPHEN \255 to U+2212 code point which is mathematical minus sign. Therefore man -Tps does not produce correct postscript file from manpage which uses \- as switch parameter. And ps2pdf damage it even more. > Regarding -Tdvi, i frankly don't know. I never used it and right > now, i do not remember hearing anybody ever talking about maintaining > it, but i may easily have missed something about -Tdvi. That is pity because I think that "man -Tdvi | dvipdfmx" gives better output (for printing) as man -Tpdf. I looked deeply at DVI output and basically \- is printed in DVI as glyph with index 0 from font cmsy10. Looking at cmsy10.pfb Type1 font file and there is "dup 0 /minus put" which means that this character is mathematical minus with Unicode code point U+2212. Converting output DVI file to PDF (via dvipdfmx) prove it, PDF viewers see and copy+paste this character as mathematical minus. So the result is that "preferred" way for writing command line switches in manpage via \- sequence is broken for -Tps and -Tdvi. Is somebody going to fix PS and DVI output to be "compatible" with "preferred" way how to write hyphen-minus in manpages? -- Pali Rohár pali.ro...@gmail.com
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