CTAN update: pgf

[CTAN Announcements]

The PGF/TikZ Team  submitted an update to the

                pgf

package.

Version number: 3.1.8
License type: lppl1.3c gpl2 fdl

Summary description: Create PostScript and PDF graphics in TeX

Announcement text:
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# BREAKING CHANGES

If a topath is bent by any of the in=, out=, bend=, etc. options, a
Bezier curve is constructed in the background.  To infer the positions
of the control points the start and end coordinate are converted to
absolute coordinates. However, this has the effect that subsequent
points on the path think that the endpoint of the topath was absolute
which can lead to counter-intuitive path construction, e.g.
```latex
\draw (2,0) to[out=0,in=180] +(1,0) -- ++(0,-1) -- +(1,0);
```
If old code relies on this behavior, this drawing will silently break!
Please open an issue if you rely on this.

# Bug fixes

This release introduces a fix for path handling which concerns
expansion of tokens on the path in particular with respect to
conditional.  Previously when the expansion of a conditonal resulted in
a frozen \relax the parser would just give up.  Now the parser will
skip over the frozen \relax and continue to expand tokens.  Whether
this will result in a meaningful expansion is up to the user.

This release also includes other bug fixes. On GitHub you can click the
commit hashes and the issue numbers to get to the fix and the ticket,
respectively.

a4c275704 #952
8a997bbc1 #954
8f37bca84 #962
3cbe5a192 #844
49e5f0a08 #654
17a95e4c5 #966
ad06895a6 #966
79e613ae1 #966

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This package is located at 
   http://mirror.ctan.org/graphics/pgf/base

More information is at
   https://www.ctan.org/pkg/pgf


------------------------------------------------------------------------

   Thanks for the upload.

     For the CTAN Team
    Manfred Lotz


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