It's a bug in 0.91.2.  This has been fixed on the maintenance branch (if 
you're comfortable using SVN), or we do plan to release a bugfix 0.91.3 
release soon.

Cheers,
Mike

Maxim Fedorovsky wrote:
>            Dear all,
>
>     The following TeX expression did not produce any error message with 
> matplotlib versions 0.87.3 - 0.90.2 :
>
>     r'$Wavenumber,\ [\ cm^{-1}\ ]$'
>
>     The following error is produced with version 0.91.2 :
>
>     <class 'matplotlib.pyparsing.ParseFatalException'>: Expected end of 
> math '$'
>     $Wavenumber,\ [\ cm^{-1}\ ]$ (at char 0), (line:1, col:1)
>
>     The problem comes about because of the square brackets. Could 
> everyone please explain me how to handle this situation (without placing 
> the brackets outside of '$$') ?
>
>
>     Thanks in advance,
>     Dr. Maxim Fedorovsky.
>
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-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA


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