/usr/share/doc/libghc-lazysmallcheck-dev/examples/test/TestMux3.hs is in libghc-lazysmallcheck-dev 0.6-9build1.
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 | import Test.LazySmallCheck
import Mux
import System
main = do [d] <- getArgs ; depthCheck (read d) prop_encDec
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