textproc/txt2tags: Update to 3.4, fix graphics/qgis and graphics/qgis-ltr with this newest version

[lbartoletti]

Summary

textproc/txt2tags: Update to 3.4, fix graphics/qgis and graphics/qgis-ltr with this newest version

• Use python3 only [1]
• Fix graphics/qgis and graphics/qgis-ltr with txt2tags-3.4 (remove --css-sugar --css-inside) [2][3]
  
  Changelog:
  
  https://github.com/txt2tags/txt2tags/blob/v3/CHANGELOG.md
  
  [1] txt2tags v3 can use python2 too. But, only graphics/qgis* uses it and depends on python3. I want to avoid adding dependencies. And python2 is dead, isn't it? ;) [2] https://github.com/txt2tags/txt2tags#feature-differences-between-versions [3] https://github.com/qgis/QGIS/issues/33516

Test Plan

QA:

• portlint: OK (looks fine.)
• testport: OK (poudriere: 11, 12, 13 / i386, amd64)

[tcberner]

graphics/qgis-ltr/Makefile

153 ↗

(On Diff #66771)

^why do this in a loop?

... ${WRKSRC}/doc/INSTALL ${WRKSRC }/doc/news

[lbartoletti]

graphics/qgis-ltr/Makefile

153 ↗

(On Diff #66771)

Just a habit to iterate when there are several files to modify :)
I'll fix that.

[lbartoletti]

Remove the loop

[tcberner]

Looks good to me.

[mat]

head/graphics/qgis-ltr/Makefile

151–153

The only replacements allowed with sed are variable replacements. All static changes have to be put into patches. See 4.4.3. Simple Automatic Replacements