Fix issue67

[syohex]

Highlight italic only following cases

• Italic start and end point are same line
• If italic start and end point are different line, both lines are not list

Original

Fixed version

This is related to #67.
CC: @hmelman

[jrblevin]

Thanks! I'll merge this, but I think there are some cases that might still slip through. For example, what about this:

* something about function
  foo_bar
* something else about
  foo_bar

I think checking all lines between begin and end for list markers will cover this case as well. Given that, might a regexp search for the list item regexp in the potential italic region be more efficient?

[jrblevin]

Also, regarding the tests you added, with this one Markdown.pl does generate a list item with italics:

* foo_bar
foo_bar

Now I'm thinking that checking for markdown-list-face in the possible italic range is a safer approach. It also covers the hanging list example above and is more efficient since we've already done the hard work of parsing the nested lists.

[jrblevin]

I updated this by adding a new test in 6aafece and changing to check for markdown-list-face in 84d94aa. Let me know if you see any problems.