anchor.diff:  
   // Not used in the specification (needed here for <uri>).
   stringLiteralWithoutInterpolation
  -    :    singleLineStringWithoutInterpolation+
  +    :    singleStringWithoutInterpolation+
       ;
   
   setOrMapLiteral
  
positive.code: 
  // CHANGES:
  //
  // v0.12 (82403371ac00ddf004be60fa7b705474d2864509) Cf. language issue #1341:
  // correct `metadata`. Change `qualifiedName` such that it only includes the
  // cases with a '.'; the remaining case is added where `qualifiedName` is used.
  
negative.code:     ;
  
  // Not used in the specification (needed here for <uri>).
  singleStringWithoutInterpolation
      :    RAW_SINGLE_LINE_STRING
      |    RAW_MULTI_LINE_STRING
      |    SINGLE_LINE_STRING_DQ_BEGIN_END
      |    SINGLE_LINE_STRING_SQ_BEGIN_END
      |    MULTI_LINE_STRING_DQ_BEGIN_END
      |    MULTI_LINE_STRING_SQ_BEGIN_END
      ;
  
  singleLineString
  