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Fix support for empty usetex strings.#16410

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anntzer wants to merge1 commit intomatplotlib:masterfromanntzer:emptytex

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anntzer
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@anntzeranntzer commentedFeb 4, 2020
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Currently,figtext(.5, .5, "%foo", usetex=True) results in an obscure
exception (FileNotFoundError: No such file or directory: blah.dvi).

Fix that by forcing tex to always generate a page, by inserting at least
an empty \hbox{}.

Closes#16409.

Edit: looks like this shifts some tex strings a tiny bit, but I already have another patch which shifts them more -- specifically, a followup to#16373 which actually gives correct baselines even without using tex.latex.preview. So I'll just wait for that.

PR Summary

PR Checklist

  • Has Pytest style unit tests
  • Code isFlake 8 compliant
  • New features are documented, with examples if plot related
  • Documentation is sphinx and numpydoc compliant
  • Added an entry to doc/users/next_whats_new/ if major new feature (follow instructions in README.rst there)
  • Documented in doc/api/api_changes.rst if API changed in a backward-incompatible way

@anntzeranntzer added this to thev3.3.0 milestoneFeb 4, 2020
@anntzeranntzer changed the titleImprove error arising from fully commented-out TeX strings.Fix support for empty usetex strings.Feb 5, 2020
Currently, `figtext(.5, .5, "%foo", usetex=True)` results in an obscureexception (`FileNotFoundError: No such file or directory: blah.dvi`).Fix that by forcing tex to always generate a page, by inserting at leastan empty \hbox{}.
@QuLogic
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Which PR is this waiting for?

@anntzer
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#16476 (sorry forgot to update the original text), but I guess I should combine both into a single PR for the usual image updating reasons.

@anntzer
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included into#16476 (as first commit)

@anntzeranntzer deleted the emptytex branchMarch 10, 2020 09:07
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Confusing error on fully commented-out usetex strings
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