[Fix #1117] Don't correct indentation for block comments

We choose a simple solution and just avoid auto-correct entirely if
a node contains a block comment.
Add autocorrect to BlockComments cop

Make ordinary comments from block comments. Related to #1117.
Merge pull request #1119 from jonas054/fix_1117_block_comments

Fix block comments
[Fix #1075] More strict limits on when to require trailing comma

When TrailingComma:EnforcedStyleForMultiline is comma, we only
report an offense if each value in the list is on its own line,
and the closing round/square/curly bracket is also on its own line
(as opposed to sharing a line with the last value).
Merge pull request #1121 from jonas054/1075_trailing_comma

[Fix #1075] More strict limits on when to require trailing comma