Log Message:
Update to 1.9.2

* buildlink to print/poppler-cpp

Changelog:
1.9.2

- Added missing step to the README.

1.9.1

- Save As now preserves the aspect ratio. Bug reported by Rainer
  Krachten.

1.9.0

- Added Czech translation provided by Pavel Fric.

- Will now use the default locale's language for standard dialogs (e.g.,
  for the file dialog).

- Dragging & dropping one or two files onto the filename line edits or
  onto the file viewer panels is now supported. Independently suggested
  by Liviu Andronic and Rory Gordon.

- Show Zones checkbox is always visible (it was only visible with
  --debug in earlier versions).

- DiffPDF now starts up with its initial comparison mode being whatever
  comparison mode was in force when it was shut down (or Words mode the
  first time it is run).

- Improved About box with more version info + contributors.

- Added --help command line option.

1.8.0

- Introduced zoning: this can be slow in Characters mode but can provide
  better accuracy in text modes.

1.7.1

- Improved Character mode to be as liberal about hyphens as Words mode.
- Minor doc changes that I forgot for 1.7.0.
- Minor GUI bug fixes and changes.
- Minor under the hood efficiency improvements.

1.7.0

- Renamed Text mode to Words mode. This mode is best for alphabetic text
  (e.g., English).
- Added Characters mode. This mode is best for logographic text (e.g.,
  Chinese and Japanese). This was suggested by Paul Howarth.

1.6.3

- Very minor cosmetic changes.

1.6.2

- Save button is now only enabled if there are changes.
- An improved help window with slightly more information.

1.6.1

- In rare cases the highlighting on the right hand page could be in the
  wrong (horizontal) position; this has now been fixed.

1.6.0

- In addition to Appearance comparisons using highlighting, some
  composition modes can now be used to help make subtle differences more
  visible. (This was inspired by feedback by Florian Heiderich.)
- Can now control the square size for appearance comparisons. Using very
  small squares can help reveal tiny Appearance differences.
- Can now control the fill opacity for highlighting.
- Extended zoom range from 20% to 800% (was 25% to 400%).

1.5.1

Quite a few false-positives have now been eliminated:
- All hyphens are treated the same now.
- Some weirdly-encoded open/close double-quotes are treated as normal
  Unicode open/close double-quotes.
- Improved whitespace ignoring.