anchor.diff:    static final DataError accessorAnimationInputNonIncreasing = new DataError._(
         'ACCESSOR_ANIMATION_INPUT_NON_INCREASING',
         (args) => 'Animation input accessor element at index ${args[0]} '
  -          'is less than or equals to previous: ${args[1]} <= ${args[2]}.');
  +          'is less than or equal to previous: ${args[1]} <= ${args[2]}.');
   
     static final DataError accessorSparseIndicesNonIncreasing = new DataError._(
         'ACCESSOR_SPARSE_INDICES_NON_INCREASING',
         (args) => 'Accessor sparse indices element at index ${args[0]} '
  -          'is less than or equals to previous: ${args[1]} <= ${args[2]}.');
  +          'is less than or equal to previous: ${args[1]} <= ${args[2]}.');
   
     static final DataError accessorSparseIndexOob = new DataError._(
         'ACCESSOR_SPARSE_INDEX_OOB',
  
positive.code:   static final SemanticError minVersionGreaterThanVersion = new SemanticError._(
        'ASSET_MIN_VERSION_GREATER_THAN_VERSION',
        (args) => 'Asset minVersion ${_q(args[0])} is greater '
            'then version ${_q(args[1])}.',
        Severity.Warning);
  
    static final SemanticError invalidGlValue = new SemanticError._(
  
negative.code:       (args) => 'Invalid value ${args[0]} for GL type ${_q(args[1])}.');
  
    static final SemanticError integerWrittenAsFloat = new SemanticError._(
        'INTEGER_WRITTEN_AS_FLOAT',
        (args) => 'Integer value is written with fractional part: ${args[0]}.');
  
    static final SemanticError accessorNormalizedInvalid = new SemanticError._(
  