Processed: gwyddion: Depend on gtksourceview2

[Debian Bug Tracking System]

Processing control commands:

> block 911166 by -1
Bug #911166 [src:gtksourceview2] gtksourceview2: Do not release with Buster
911166 was blocked by: 885676 885678 885681 885675 890456 911164
911166 was not blocking any bugs.
Added blocking bug(s) of 911166: 911167

-- 
911166: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=911166
911167: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=911167
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