test: enable max-len for test-repl

Instead of disabling max-len (ESLint's line-length rule) for the entire
file, reformat to avoid exceeding length restrictions in most cases and
disable the rule only on specific lines where exceeding the length
restriction may be a better choice than conforming to it.

PR-URL: https://github.com/nodejs/node/pull/11559


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>