Unwanted partial word highlight

[evanwarner]

In my settings I have

{
  "text": "BUG:",
  "color": "#E47D7D",
  "backgroundColor": "transparent"
}

But this will create partial highlights like DEBUG:

Would be nice if we could specify keywords with RegEx to be able to avoid this.

[evanwarner]

Looking at why this got reopened, and seeing #42, seems like allowing RegEx per style is the way to go.