Add support for (amsmath) multlined environment

[wyleyr]

I was pleased to discover that texmath and pandoc already support most of the amsmath environments! Unfortunately I am trying to convert a document that makes use of the multlined environment (the version of multline that can be used inside another equation environment) and pandoc doesn't recognize it, so this is a feature request to add support for this environment.

I hope this is as simple as adding

  , ("multlined", gather)

to the list of environments in src/Text/TeXMath/Readers/TeX.hs but I'm no expert on how this code works.

[jgm]

Yes, I think it is that simple. Note: as tex interprets multiline, the first part will be aligned to the left and the second part will be displayed in the next line and aligned to the right. texmath won't capture this formatting detail.

[wyleyr]

Thanks John! I am always astounded by your response times.

[jgm]

Hi! I didn't recognize your handle. I've found that either I do it right away or it languishes for years...