Add "=" to flags in user manual
Add "=" to flags in user manual

The usage was inconsistent, with some using "=" and some not.

Fixes #13146

PiperOrigin-RevId: 362157584

meteorcloudy/bazel,cushon/bazel,twitter-forks/bazel,bazelbuild/bazel,twitter-forks/bazel,katre/bazel,katre/bazel,twitter-forks/bazel,katre/bazel,bazelbuild/bazel,twitter-forks/bazel,perezd/bazel,cushon/bazel,twitter-forks/bazel,ButterflyNetwork/bazel,ButterflyNetwork/bazel,twitter-forks/bazel,cushon/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,ButterflyNetwork/bazel,perezd/bazel,perezd/bazel,perezd/bazel,bazelbuild/bazel,perezd/bazel,katre/bazel,perezd/bazel,katre/bazel,cushon/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,bazelbuild/bazel,cushon/bazel,meteorcloudy/bazel,meteorcloudy/bazel,perezd/bazel,meteorcloudy/bazel,bazelbuild/bazel,cushon/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,twitter-forks/bazel,katre/bazel,bazelbuild/bazel