Fix CTE generation when the snippets have trailing semicolons

[edublancas]

Describe your changes

Issue number

Closes #319

Checklist before requesting a review

• Performed a self-review of my code
• Formatted my code with pkgmt format
• Added tests (when necessary).
• Added docstring documentation and update the changelog (when needed)

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📚 Documentation preview 📚: https://jupysql--544.org.readthedocs.build/en/544/

[neelasha23]

Added a couple of comments.
For the CTE deprecation PR there's test file named test_compose.py. Should I rename to test_magic_cte.py as per this PR?

[edublancas]

Added a couple of comments.
For the CTE deprecation PR there's test file named test_compose.py. Should I rename to test_magic_cte.py as per this PR?

yes, please rename it