[yaml] keys with hyphens break syntax highlighting

[weevilgenius]

Editing a yaml file which has a hyphen in an unquoted key name seems to break syntax highlighting for the value of that key

Tested in 0.10.5

[aeschli]

Reproduced. Snippet

----
test1  : dsd
test2  : abc-def
test-3  : abcdef
test-4  : abc-def

[aeschli]

This issue was moved to textmate/yaml.tmbundle#11

[hxlnt]

Noting that this applies not only to strings but also to negative numbers.