fix: remove stderr print from example test

[ianlewis]

Description:

Remove a print to stderr debug statement from the template example test.

Related Issues:

Fixes #181

Checklist:

• Review the CONTRIBUTING.md documentation.
• Add a reference to a related issue in the repository.
• Add a description of the changes proposed in the pull request.
• Add unit tests if applicable.
• Update documentation if applicable.
• Add a note in the CHANGELOG.md if applicable.

[Copilot]

Pull request overview

This PR removes a debug statement from the template example test file that was printing token values to stderr. The change cleans up test output by eliminating unintended debugging output.

Changes:

• Removed fmt.Fprintln(os.Stderr, token.Value) debug statement from the parseBlockStart function

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