Following issues are addressed:---"constant misnomer (has: AssocSplat, should have: AssocSplatNode) brings on formatting failure": "{a => b}"hash label key duplicated: "{a: b}"identity hash formatting failure: "{a:}"mixed hash content loss: "{a => b, c: d}"funcall with kwargs gets bogus '=>': "fun(a: b)""empty #call formatting failure": fun[]"#-@ appended to arg": "-1"empty funcall formatting failure: fun()empty super call formatting failure: super()ternary conditional formatting failure: "a ? b : c"incorrect postfix unless for compound statements: unless a; b; c; endAlternationPatternNode: foo => bar | bazCallOperatorAndWriteNode: foo.bar &&= valueCallOperatorOrWriteNode: foo.bar ||= valueClassVariableOperatorAndWriteNode: "@@target &&= value"ClassVariableOperatorOrWriteNode: "@@target ||= value"ClassVariableOperatorWriteNode: "@@target += value"ConstantOperatorAndWriteNode: Target &&= valueConstantOperatorOrWriteNode: Target ||= valueConstantOperatorWriteNode: Target += valueConstantPathOperatorWriteNode: Parent::Child += valueConstantPathOperatorAndWriteNode: Parent::Child &&= valueConstantPathOperatorOrWriteNode: Parent::Child ||= valueGlobalVariableOperatorAndWriteNode: $target &&= valueGlobalVariableOperatorOrWriteNode: $target ||= valueGlobalVariableOperatorWriteNode: $target += valueInstanceVariableOperatorAndWriteNode: "@target &&= value"InstanceVariableOperatorOrWriteNode: "@target ||= value"InstanceVariableOperatorWriteNode: "@target += value"KeywordHashNode: "[**{}]"LocalVariableOperatorAndWriteNode: target &&= valueLocalVariableOperatorOrWriteNode: target ||= valueOrNode: left or rightRequiredDestructuredParameterNode: def foo((bar, baz)); endSourceFileNode: __FILE__SourceLineNode: __LINE__SourceEncodingNode: __ENCODING__Notes:- Entries associated with a YARP Node class indicate a formatting  failure due to #format method not being implemented for given  class; so in these cases the fix boils down to implementing format.- For these entries the sample code that's given in the entry is the  sample code from the YARP definition (config.yml), with one exception:  the sample code for KeywordHashNode is 'foo(a: b)', but for that  expression the formatting code preempts winding down to the  KeywordHashNode instance, so the lack of KeywordHashNode#format is  not triggered. The expression given for KeywordHashNode does indeed  trigger KeywordHashNode#format. (Ironically, 'foo(a: b)' still had  a formatting issue, but for a different reason.)- The aforementioned class tagged entries and the ones where  "formatting failure" is indicated raise an exception with  SyntaxTree::Formatter.format; the other cases do return but with a  bogus result.- The hash related issues (ones where the word 'hash' occurs in the label,  entries 2. to 4.) are shadowed by the first one (constant misnomer).  Without fixing the name these entries will also end up with an exception.  When the constant name is fixed, the indicated issue will be present.Tested with YARP 0eb5f7c3.