Document a few more differences between Skylark and Python.
Document a few more differences between Skylark and Python.

RELNOTES: None.
PiperOrigin-RevId: 185378771

ButterflyNetwork/bazel,meteorcloudy/bazel,dropbox/bazel,meteorcloudy/bazel,perezd/bazel,werkt/bazel,katre/bazel,dslomov/bazel,twitter-forks/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,dslomov/bazel-windows,ButterflyNetwork/bazel,dslomov/bazel,ButterflyNetwork/bazel,ulfjack/bazel,werkt/bazel,ulfjack/bazel,ButterflyNetwork/bazel,dropbox/bazel,dropbox/bazel,bazelbuild/bazel,dslomov/bazel-windows,perezd/bazel,davidzchen/bazel,akira-baruah/bazel,dropbox/bazel,bazelbuild/bazel,dslomov/bazel,meteorcloudy/bazel,perezd/bazel,werkt/bazel,aehlig/bazel,akira-baruah/bazel,safarmer/bazel,safarmer/bazel,twitter-forks/bazel,dslomov/bazel,davidzchen/bazel,katre/bazel,katre/bazel,perezd/bazel,perezd/bazel,akira-baruah/bazel,cushon/bazel,dslomov/bazel,dslomov/bazel,aehlig/bazel,davidzchen/bazel,dslomov/bazel-windows,twitter-forks/bazel,twitter-forks/bazel,davidzchen/bazel,aehlig/bazel,akira-baruah/bazel,davidzchen/bazel,bazelbuild/bazel,cushon/bazel,safarmer/bazel,ulfjack/bazel,safarmer/bazel,ulfjack/bazel,twitter-forks/bazel,aehlig/bazel,davidzchen/bazel,bazelbuild/bazel,ulfjack/bazel,safarmer/bazel,aehlig/bazel,aehlig/bazel,dslomov/bazel,cushon/bazel,ulfjack/bazel,ulfjack/bazel,dropbox/bazel,meteorcloudy/bazel,werkt/bazel,meteorcloudy/bazel,cushon/bazel,katre/bazel,cushon/bazel,werkt/bazel,perezd/bazel,bazelbuild/bazel,bazelbuild/bazel,twitter-forks/bazel,werkt/bazel,dslomov/bazel-windows,perezd/bazel,akira-baruah/bazel,dropbox/bazel,akira-baruah/bazel,davidzchen/bazel,dslomov/bazel-windows,twitter-forks/bazel,ButterflyNetwork/bazel,katre/bazel,cushon/bazel,safarmer/bazel,aehlig/bazel,dslomov/bazel-windows,meteorcloudy/bazel,katre/bazel