Chrome Version: 

Google Chrome	69.0.3497.100 (Official Build) (64-bit)

Revision	8920e690dd011895672947112477d10d5c8afb09-refs/branch-heads/3497@{#948}

OS	Mac OS X

JavaScript	V8 6.9.427.23

What steps will reproduce the problem?

(1) Visit https://jsbin.com/zuvamif/edit?html,output

See how when two dash/minus characters precede a word with a <wbr> character inside, that creates a gap between the letters, but when one dash is used, it does not.

What is the expected result?

Inside Google Sans, we have a negative kern value of `-128` between two dashes `--`. 

This is to merge the dashes in order to create one continuous line. 

What happens instead?

This should not add any amount of space around other glyphs; having a negative kern value on this is then applied as a positive value on the adjacent character of the `<wbr>` spacing operator. 

Removing the `--` at the beginning of the string removes the issue, as does removing the kern value of the dashes; however, the kerning in GS is needed for brand purposes.