use -f with git checkout in travis prevents cases where there are local changes due to unnormalized line endings which git automatically corrected on cloning
use -f with git checkout in travis
prevents cases where there are local changes due to unnormalized line
endings which git automatically corrected on cloning
neothemachine/lensfunpy,letmaik/lensfunpy,neothemachine/lensfunpy,letmaik/lensfunpy