[PostGIS] #6111: Don't run test_check_news.py when not using git

[PostGIS]

#6111: Don't run test_check_news.py when not using git
-----------------------------+---------------------------
  Reporter:  Bas Couwenberg  |      Owner:  robe
      Type:  defect          |     Status:  closed
  Priority:  medium          |  Milestone:  PostGIS 3.7.0
 Component:  documentation   |    Version:  master
Resolution:  fixed           |   Keywords:
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Comment (by Darafei Praliaskouski <komzpa@…>):

 In [changeset:"369235b92e0d03584916c42bf074cd02122addb9/git" 369235b/git]:
 {{{#!CommitTicketReference repository="git"
 revision="369235b92e0d03584916c42bf074cd02122addb9"
 Merge pull request 'build: skip NEWS unit tests outside Git worktrees'
 (!727) from Komzpa/postgis:codex/ticket-6111-check-news-no-git into master

 Skip the Python NEWS unit tests when the source tree is not a Git
 worktree, while still running the shell NEWS checks that do not require
 Git history. This fixes source package documentation checks in build
 environments where git is absent.

 Patch by Bas Couwenberg.

 Closes https://trac.osgeo.org/postgis/ticket/6111
 Closes #6111

 Reviewed-on: https://gitea.osgeo.org/postgis/postgis/pulls/727
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6111#comment:2>
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