[TxMt] Markdown bundle bug: hyphen unusable in lists

[textmate at alanhogan.com]

The Markdown bundle:

- Correctly highlights hyphen-delimited bullet lists, and
- Correctly translates hyphen-delimited bullet lists to HTML, but
- Does not allow the writing of such lists!  Instead, hyphen-tab creates a horizontal line.

This is a problem because:

- Users may want to use hyhpens to demark bulleted lists instead of asterisks or plus signs for visual reasons

- Users may want to use hyhpens to demark bulleted lists instead of asterisks or plus signs because the hyphen is the only punctuation of those options which does not require use of the Shift button

- This behavior occurs even when converting a paragraph to a bulleted list item (result is "----------[...]---previous paragraph text")

A suggested fix is:

- Force users to type two hyphens for the horizontal-line auto-completion

Thanks,

Alan Hogan