Wrong custom-elements highlighting

[rascada]

not highlight after "-" (U+002D HYPHEN-MINUS)
https://www.w3.org/TR/custom-elements/#dfn-custom-element-type

[tomByrer]

- is how you can run Javascript inside of Jade.
http://learnjade.com/tour/assignment/

[rascada]

js run only when it's first sign, web-components don't start with -

example-component
  h1 i'm inside example component

[tarossi]

+1 for this issue