Deprecated ctx.outputs.executable used in rules/test_rule

[errangutan]

In line_length.bzl:

ctx.actions.write(
    output = ctx.outputs.executable,
    content = script,
)

Notice that ctx.outputs.executable default field is used, and the documentation states this is deprecated:

(Deprecated) If the rule is marked executable or test, there is a field named "executable", which is the default executable. It is recommended that instead of using this, you pass another file (either predeclared or not) to the executable arg of DefaultInfo.