Fix bug with --auto-gen-config and SpaceInsideBlockBraces

[meganemura]

Auto generated config does not disable SpaceInsideBlockBraces cop for the following situation.

$ bundle exec rubocop --auto-gen-config foo.rb
foo.rb:1:6: C: Space between { and | missing.
each {|x| x }
     ^^

Offence detected, but we got the following auto-generated config.

Style/SpaceInsideBlockBraces:
  Enabled: true

So, the config does not disable it.

And, the similar issue is occured in the situation below.

• .rubocop.yml

Style/SpaceInsideBlockBraces:
    SpaceBeforeBlockParameters: false
    EnforcedStyle: no_space

• detection

$ bundle exec rubocop --auto-gen-config foo.rb
foo.rb:1:7: C: Space between { and | detected.
each { |x| x}
      ^

• auto-generated config

Style/SpaceInsideBlockBraces:
  Enabled: true

This commit fixes these issues.

RuboCop: 0.29.1 (using Parser 2.2.0.3, running on ruby 2.1.4 x86_64-darwin13.0), master (ccedef2)

[jonas054]

Looks good, but please add a test that fails without the fix.

[meganemura]

Added failing specs ☺️

[bbatsov]

And squash all commits into one. :-)

[meganemura]

Squashed 🙋

[bbatsov]

👍 Thanks!