# [PATCH] lyxpreview_tools.py: fix a regular expression

Kornel Benko kornel at lyx.org
Sat Feb 15 20:15:17 UTC 2020

Am Sat, 15 Feb 2020 14:03:43 -0500
schrieb Scott Kostyshak <skostysh at lyx.org>:

> Attached is a patch for lyxpreview_tools.py, but I don't know Python
> well and I don't know how to test whether this code works as intended
> now or not. All I know is it gets rid of the error.
>
> I originally saw that error on master when opening the User Guide with
> Preview enabled.
>
> Can someone give the patch a check?
>
> Best,
>
> Scott

Definitely better as the original. Works here as expected.
Still one element making problems:
Warning: Failed to produce 1 preview snippet(s)
Looking at the lyxpreviewkn4998.log here, looks like it is not related to your patch.

Preview: Snippet 85 338603 0 465893
[85]
! Undefined control sequence.
l.628 x^{2}-2x-2\Rightarrow\question
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., \hobx'), type I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

Other snippets are OK.

Kornel
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