ligatures are renderd (in text/tspan-elements) but 'zero width non-joiner' is rendered wrong

[Matthias Sprünglin]

Since version 0.91, inkscape renders ligature characters in text. Ligatures are automatically inserted when corresponding characters are entered, for example the german characters 'ff'. Yet, this is not allways correct. In words like "Auffahrt", these ligatures should not be used (because the two letters do not belong to the same syllable). Normally, this is indicated by entering a "zero width non-joiner" unicode character in between the letters in question. In Inkscape, this character does not seem to be "zero width". Firefox renders the attached document correctly, while Inkscape enters a space for the 'zero width non-joiner' (using font DejaVu Serif, which contains ff-Ligature https://sourceforge.net/projects/dejavu/).

This should eighter be fixed, or ligature rendering should be disabled again (for it is just plain wrong this way).

Inkscape 0.91 r13725 on Windows 7 Pro 64bit (6.1.7601 sp1 build 7601)