Design decisions

Favour full-line comments.

The heuristic in textobj-comment only looks for full-line comments when doing the upwards search.

Reason: Avoid false positives. Otherwise there are a lot of inline matches we don't want to match.

• In Vim script every double-quoted string would be an inline match.
• In Java, every > would be an inline match because the Java filetype plugin declares it a comment leader.
• ...

Favour simple leaders.

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