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Author SHA1 Message Date
John MacFarlane
cb7b0a6985 Allow em for image height/width in HTML, LaTeX.
- Export `inEm` from ImageSize [API change].
- Change `showFl` and `show` instance for `Dimension` so
  extra decimal places are omitted.
- Added `Em` as a constructor of `Dimension` [API change].
- Allow `em`, `cm`, `in` to pass through without conversion
  in HTML, LaTeX.

Closes #3450.
2017-05-25 22:48:27 +02:00