Rename to allow all exiv2 tags as placeholders (backport #2791)

[mergify]

closes #2238

• The syntax: the tag name has to be enclosed in colons.
• The placeholder will be replaced by translated value, not by the plain value.
• Characters in tag's translated value, which are not allowed in file names, will be replaced by underscore.

---

This is an automatic backport of pull request #2791 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of d31fff2 has failed:

On branch mergify/bp/0.28.x/pr-2791
Your branch is ahead of 'origin/0.28.x' by 6 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit d31fff24.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   exiv2.md

no changes added to commit (use "git add" and/or "git commit -a")

Cherry-pick of eea87bf has failed:

On branch mergify/bp/0.28.x/pr-2791
Your branch is ahead of 'origin/0.28.x' by 8 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit eea87bf6.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   app/actions.cpp

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[kmilos]

@norbertwg Any ideas why this is not working (test fails) on the 0.28.x branch?

AssertionError: 'File[87 chars]runner/work/exiv2/exiv2/test/tmp/02_Sep_2018:basesuffix:.exv\n' != 'File[87 chars]runner/work/exiv2/exiv2/test/tmp/02_Sep_2018.PANO.exv\n'
  File 1/1: /home/runner/work/exiv2/exiv2/test/tmp/_DSC8437.PANO.exv
- Renaming file to /home/runner/work/exiv2/exiv2/test/tmp/02_Sep_2018:basesuffix:.exv
?                                                                    ^^^^^^^^^^^^
+ Renaming file to /home/runner/work/exiv2/exiv2/test/tmp/02_Sep_2018.PANO.exv
?                                                                    ^^^^^
 : Standard output does not match

[kmilos]

NVM, think I found the missing backport piece...

@kevinbackhouse Please feel free to squash the last commits.