Fix documentation in bazel_external_repository_test.py
Fix documentation in bazel_external_repository_test.py

RELNOTES: None.
PiperOrigin-RevId: 200351084

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