This reverts commit 27dd2867cda5c789efaa5078214ad2fd82adcebf.
This is to fix the test I added.
(I separated commits to test a new behavior of ruby-commit-hook)
fe055d521a
https://github.com/ruby/irb/pull/249 actually slowed down how `code` is
concatenated. The original way of creating `code` is faster.
[before]
user system total real
2.420137 0.005364 2.425501 ( 2.426264)
[after]
user system total real
1.000221 0.007454 1.007675 ( 1.008295)
Theoretically, this implementation might skip lines that don't appear in
Ripper tokens, but this assumes such lines don't impact whether the code
passes compilation or not. At least normal blank lines seem to have an
`on_ignored_nl` token anyway though.
27dd2867cd