- the old code used the edge information and examined the next face edges
    to find the orientation. This fails since the direction of the edge
    itself is missing.

  - simpler: find the edge start on both faces, check the next face point.
    If they are the same, the edge goes in the same direction on both faces
    and thus the orientation is incorrect.

  Pro: Good delimitation. Good visual distinction. No confusion with normal
       cases, since '{}' characters are excluded by !word::valid()
  Con: Possible quoting issues when creating directly instead of via paraFoam,
       but seemed to work fine with bash TAB completion.