Extra command-line flags to pass to `rustc`. The value may be a array of
strings or a space-separated string.
-There are three mutually exclusive sources of extra flags. They are checked in
+There are four mutually exclusive sources of extra flags. They are checked in
order, with the first one being used:
1. `CARGO_ENCODED_RUSTFLAGS` environment variable.
Extra command-line flags to pass to `rustdoc`. The value may be a array of
strings or a space-separated string.
-There are two mutually exclusive sources of extra flags. They are checked in
+There are three mutually exclusive sources of extra flags. They are checked in
order, with the first one being used:
1. `CARGO_ENCODED_RUSTDOCFLAGS` environment variable.