Add `CharacterArray >> #emphasisAtPoint:on:` for compatibility

Cherry-picked changes from eXept, part 2 ...from commit a6b6dda4caff: * CharacterArray.st * String.st * SequenceableCollection.st

Cherry-picked changes from eXept, part 1 ...from commit a6b6dda4caff: * CompiledCode.st * ExecutableFunction.st * Method.st * RecursionLock.st

Add more compatibility methods to `UninterpretedBytes`

Honour formatter settings in `SmalltalkLanguage >> #methodDefinitionTemplate...`

Fix `Collection >> #sortedBy:` w.r.t unordered collections ...such as `Set`s

Fix unlikely but possible race in `WeakValueDictionary` It may happen that value in `valueArray` could have been already collected by the GC but #clearDeadSlots have not yet been called. When this happened, `#at:ifAbsentPut:` returned tombstone rather than updating the dictionary with value from block. This commit fixes this by checking whether `valueArray` contain the tombstone and if so, clearing up the dead slots and restarting the operation. HTH.

Reworked `SimulatedClassPool >> #associationAt:ifAbsent:` to throw an error ...if there's no such class variable. This makes it behave more like dictionary / pool.

Add (missing) `CharacterArray >> #isBinary` `#isKeyword` and `#isUnary` were already there so having `#isBinary` seems right.

Fix `PositionableStream >> #peekForAll:` w.r.t end of stream `#peekForAll:` raised an error when trying to peek past the end of the stream, whereas it should (it is more logical) to just return `false`). This is how it behaves in other dialects, too.