Specs 02, 14, and 15a: Fix Style

[Erik-Russell]

Because

Style issues found by Rubocop version 1.66.1

This PR

• "Style/CommentAnnotation: Annotation keywords like Note should be all upper case, followed by a colon, and a space, then a note describing the problem.RuboCopStyle/CommentAnnotation"
• Trailing Whitespaces

Issue

Additional Information

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• [x] I have thoroughly read and understand The Odin Project Contributing Guide
• [x] The title of this PR follows the location of change: brief description of change format, e.g. String spec: Update instructions for clarity
• [x] The Because section summarizes the reason for this PR
• [x] The This PR section has a bullet point list describing the changes in this PR
• [x] If this PR addresses an open issue, it is linked in the Issue section
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