Improved wording in info message issued by :meth:.SceneFileWriter.clean_cache

[NicoWeio]

Overview: What does this pull request change?

This PR should fix the missing whitespace in an info message: … ago.You can change this ….

Further Information and Comments

Because this is such a tiny modification, I did not do any testing — I hope you don't mind.

Reviewer Checklist

• The PR title is descriptive enough for the changelog, and the PR is labeled correctly
• If applicable: newly added non-private functions and classes have a docstring including a short summary and a PARAMETERS section
• If applicable: newly added functions and classes are tested

[k4pran]

Thank you for this, looks good! Think we should also look at rewriting the message itself as "file(s) used by it the longest ago." doesn't read well.

[behackl]

Looking at this change, it seems like there still is no whitespace between the two parts of the string.

[NicoWeio]

Guess the "no testing" part wasn't a great time-saver after all.
I apparently assumed the rich logger to accept the same syntax as print, i.e. the *args are concatenated using spaces.
Instead, this will probably happen:

>>> import manim
Manim Community v0.10.0
>>> manim.logger.info("Hello")
[10/01/21 13:23:28] INFO     Hello […]
>>> manim.logger.info("Hello", "World")
[…]
TypeError: not all arguments converted during string formatting

Sorry — I'll fix this in a new PR.

[behackl]

No worries. I just realized, we have fixed the error resulting from this in #2066, but the whitespace issue still remains I believe. :-)