DOC: Updated processing of sprmCFBold.

* The previous approach to processing of sprmCFBold was not correct.  The workaround
  from applyCharacterProperties was already removed.
* Added an important FIXME into applyCharacterProperties.
* Improvements in readability of wv2 files.

TODO: Using the determineCHP function with the current istd is wrong!  The CHPs
of the character style with the istd were already merged into the current CHP.

CCBUG:239172