V0.28.0 - Rubocop — ContextQMD

New cop ExtraSpacing points out unnecessary spacing in files. (@blainesch)
New cop EmptyLinesAroundBlockBody provides same functionality as the EmptyLinesAround(Class|Method|Module)Body but for blocks. (@jcarbo)
New cop Style/EmptyElse checks for empty else-clauses. (@Koronen)
#1454: New --only-guide-cops and AllCops/StyleGuideCopsOnly options that will only enforce cops that link to a style guide. (@marxarelli)

#801: New style context_dependent for Style/BracesAroundHashParameters looks at preceding parameter to determine if braces should be used for final parameter. (@jonas054)
#1427: Excluding directories on the top level is now done earlier, so that these file trees are not searched, thus saving time when inspecting projects with many excluded files. (@jonas054)
#1325: When running with --auto-correct, only offenses that cannot be corrected will result in a non-zero exit code. (@jonas054)
#1445: Allow sprockets directive comments (starting with #=) in Style/LeadingCommentSpace. (@bbatsov)

Fix %W[] auto corrected to %w(]. (@toy)
Fix Style/ElseAlignment Cop to find the right parent on def/rescue/else/ensure/end. (@oneamtu)
#1181: (fix again) Style/StringLiterals cop stays away from strings inside interpolated expressions. (@jonas054)
#1441: Correct the logic used by Style/Blocks and other cops to determine if an auto-correction would alter the meaning of the code. (@jonas054)
#1449: Handle the case in MultilineOperationIndentation where instances of both correct style and unrecognized (plain wrong) style are detected during an --auto-gen-config run. (@jonas054)
#1456: Fix autocorrect in SymbolProc when there are multiple offenses on the same line. (@jcarbo)
#1459: Handle parenthesis around the condition in --auto-correct for NegatedWhile. (@jonas054)
#1465: Fix autocorrect of code like #$1 in PerlBackrefs. (@bbatsov)
Fix autocorrect of code like #$: in SpecialGlobalVars. (@bbatsov)
#1466: Allow leading underscore for unused parameters in SingleLineBlockParams. (@jonas054)
#1470: Handle elsif + else in ElseAlignment. (@jonas054)
#1474: Multiline string with both << and \ caught by Style/LineEndConcatenation cop. (@katieschilling)
#1485: Ignore procs in SymbolProc. (@bbatsov)
#1473: Style/MultilineOperationIndentation doesn't recognize assignment to array/hash element. (@jonas054)