Incorrect autocorrection of increment

[tarkeshwar-thakur]

i=i+1
gets autocorrected as:
i+ = 1

which raises syntax error with ruby 2.1.8.

---

Expected behavior

i += 1

Actual behavior

i+ = 1

Steps to reproduce the problem

$ cat increment.rb
i=i+1
$ rubocop -a increment.rb
Inspecting 1 file
E

Offenses:

increment.rb:1:1: C: [Corrected] Use self-assignment shorthand +=.
i=i+1
^^^^^
increment.rb:1:2: C: [Corrected] Surrounding space missing for operator =.
i=i+1
^
increment.rb:1:4: C: [Corrected] Surrounding space missing for operator +.
i=i+1
^
increment.rb:1:4: E: unexpected token tEQL
(Using Ruby 2.1 parser; configure using TargetRubyVersion parameter, under AllCops)
i+ = 1
^

1 file inspected, 4 offenses detected, 3 offenses corrected
$ cat increment.rb
i+ = 1

RuboCop version

$ rubocop -V
0.47.1 (using Parser 2.4.0.0, running on ruby 2.1.8 x86_64-darwin15.0)

[bbatsov]

Likely a bad interaction with some other auto-correct.