/usr/lib/aspell/debctrl-filter.info is in libaspell15 0.60.7~20110707-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | # debctrl filter option file
#This Filter is usable with the following version(s) of Aspell
ASPELL >=0.51
#This line will be printed when typing `Aspell help debctrl
DESCRIPTION filter for Debian packaging control files
STATIC filter
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