Ensure that lockfiles end in newlines. (#1774)
Ensure that lockfiles end in newlines. (#1774)

I encountered a repo whose precommit checks choked on our lockfiles because they didn't end in newlines.
Since this is a reasonable expectation from a text file (indeed POSIX requires it, so various CLI tools assume it),
we oblige.
pantsbuild/pex,jsirois/pex,jsirois/pex,pantsbuild/pex