Hi. Thanks for working on git bug.

When creating a label containing a colon ":" character, the search seems to become unusable in the terminal user interface. After adding the label "st:wontfix" to a bug I tried to search with each of these:

• label:st:wontfix
• label:"st:wontfix"
• label:'st:wontfix'

Each threw the error "can't tokenize".

I would expect that either the colon character should be made illegal, or some other escape sequence be adopted to allow the search to cope with colons