/usr/share/doc/libghc-extra-doc/html/src/ is in libghc-extra-doc 1.4.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libghc-extra-doc/html/src/Control-Concurrent-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/Control-Exception-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/Control-Monad-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/Data-Either-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/Data-IORef-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/Data-List-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/Data-Tuple-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/Extra.html
/usr/share/doc/libghc-extra-doc/html/src/Numeric-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/System-Directory-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/System-Environment-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/System-IO-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/System-Info-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/System-Process-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/System-Time-Extra.html
/usr/share/doc/libghc-extra-doc/html/src/hscolour.css