This is a second attempt at making this script operate when
making a binary incompatible change to the compiler, such as
the current effort to change the trait encoding.

I have just disabled the docs when STARR_REF is provided,
rather than disabling them in the first pass as I tried in
c4fc2fd. scala-dev/#89 showed that we can't defer docs to
the second pass, as the second pass isn't always run.

This is a second attempt at making this script operate when
making a binary incompatible change to the compiler, such as
the current effort to change the trait encoding.

I have just disabled the docs when STARR_REF is provided,
rather than disabling them in the first pass as I tried in
c4fc2fd. scala-dev/#89 showed that we can't defer docs to
the second pass, as the second pass isn't always run.

This is a second attempt at making this script operate when
making a binary incompatible change to the compiler, such as
the current effort to change the trait encoding.

I have just disabled the docs when STARR_REF is provided,
rather than disabling them in the first pass as I tried in
c4fc2fd. scala-dev/#89 showed that we can't defer docs to
the second pass, as the second pass isn't always run.

This is a second attempt at making this script operate when
making a binary incompatible change to the compiler, such as
the current effort to change the trait encoding.

I have just disabled the docs when STARR_REF is provided,
rather than disabling them in the first pass as I tried in
c4fc2fd. scala-dev/#89 showed that we can't defer docs to
the second pass, as the second pass isn't always run.

This is a second attempt at making this script operate when
making a binary incompatible change to the compiler, such as
the current effort to change the trait encoding.

For builds that don't define STARR_REF, we continue to build docs
in the first pass, as there will only be one pass for non-release
builds.

A previous attempt than disabling them in the first pass for all
builds (c4fc2fd) triggered scala-dev/#89.

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