src/lib.rs (2 lines):
	- line 348: // TODO: we should try harder to find additional stable tokens
	- line 381: // TODO: Perf optimisation if suffix starts with " "?


tiktoken/model.py (1 line):
	- line 6: # TODO: these will likely be replaced by an API endpoint


tiktoken/core.py (1 line):
	- line 330: # TODO: assess correctness for errors="ignore" and errors="replace"