* Move decimalToHexString into harness instead of duplicating it in multiple files
* Optimize decimalToHexString and support numbers greater than 65535
* Replace alternative decimalToHexString function with include for decimalToHexString.js
* Add decimalToHex2String to return the string representation of a two-digit hex-number
* Replace decimalToHex2String with decimalToPercentHexString to return the percent hex-encoded string of a two-digit hex-number
* Replace two String.fromCharCode calls with a single call
* Further reduce string concatentations in decodeURI[Component] tests
* Remove unnecessary Test262Error error handling in catch-clauses
* Remove try/catch wrappings in decodeURI/encodeURI tests
This function is equivalent to `$ERROR` (which is automatically included
in test environments). Remove the harness file that defines the
function, remove references to the file from test `includes` lists, and
update scripts to instead invoke the `$ERROR` function.
- Remove no longer needed noStrict flags.
- Change tests to use propertyHelper.js for strict mode compatibility.
- Add tests for return value of `delete` operator, e.g. `delete Array.prototype === false`.
- Add non-writable tests for global NaN property.
- Split some tests to run in strict mode.
- Change tests with global `var length` declaration to use a different variable name for browser environments.
- Merge duplicated tests symbol-data-property-configurable-non-strict and symbol-data-property-configurable-strict.
- Merge duplicated tests symbol-data-property-writable-non-strict and symbol-data-property-writable-strict.
- (And a small change in propertyHelper to reduce code duplication in function call.)