/usr/include/libinftext-0.7/libinftext/ is in libinfinity-0.7-dev 0.7.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libinftext-0.7/libinftext/inf-text-buffer.h
/usr/include/libinftext-0.7/libinftext/inf-text-chunk.h
/usr/include/libinftext-0.7/libinftext/inf-text-default-buffer.h
/usr/include/libinftext-0.7/libinftext/inf-text-default-delete-operation.h
/usr/include/libinftext-0.7/libinftext/inf-text-default-insert-operation.h
/usr/include/libinftext-0.7/libinftext/inf-text-delete-operation.h
/usr/include/libinftext-0.7/libinftext/inf-text-filesystem-format.h
/usr/include/libinftext-0.7/libinftext/inf-text-fixline-buffer.h
/usr/include/libinftext-0.7/libinftext/inf-text-insert-operation.h
/usr/include/libinftext-0.7/libinftext/inf-text-move-operation.h
/usr/include/libinftext-0.7/libinftext/inf-text-operations.h
/usr/include/libinftext-0.7/libinftext/inf-text-remote-delete-operation.h
/usr/include/libinftext-0.7/libinftext/inf-text-session.h
/usr/include/libinftext-0.7/libinftext/inf-text-undo-grouping.h
/usr/include/libinftext-0.7/libinftext/inf-text-user.h