Add tilde operator By @DePasqualeOrg #18

[johnmai-dev]

Modified based on the PR contributed by @DePasqualeOrg.
#18

• Directly add the tilde operator and set it as additiveBinaryOperator.
• SmolLM3 ChatTemplate requires the use of raw strings because escape characters are included in the template.

[johnmai-dev]

ml-explore/mlx-swift-examples#349

[johnmai-dev]

Support for replace is still needed.

{%- set custom_instructions = system_message.replace("/no_think", "").replace("/think", "").rstrip() -%}

[johnmai-dev]

Hi @pcuenca !
Can you help add the latest tag to swift-transformers? swift-transformers 0.1.21 does not support Jinja 1.2.1.
Thank you very much.
https://github.com/huggingface/swift-transformers/blob/0.1.21/Package.swift#L16