drop `unused` compound assignments (#2230)
authorAlex Lam S.L <alexlamsl@gmail.com>
Thu, 13 Jul 2017 16:39:34 +0000 (00:39 +0800)
committerGitHub <noreply@github.com>
Thu, 13 Jul 2017 16:39:34 +0000 (00:39 +0800)
commit5229cb2b1b345a4cedbdeacb02f114033f4c69b7
treecc667492dc416f08c182ee0b1252835408285d51
parent458e3e15f0f315dcd4a99b02bed0fb740ffdfc17
drop `unused` compound assignments (#2230)

fixes #2226
lib/compress.js
test/compress/collapse_vars.js
test/compress/drop-unused.js