can't seem to filter by attributes that start with letters that resemble operators

[gsar]

We seem to be missing a word boundary check when lexing the input into tokens. I added an attribute called primaryEmail and when I query it like this, it fails with a strange error. If I rename it to mainEmail or something else that doesn't start with one of the operators like pr/co/eq/etc, it works fine.

$ curl -H 'Authorization: Bearer deadbeef' -X GET 'https://example.com/scim/Users?filter=primaryEmail+co+%22gsar%22' | jq .
{
  "schemas": [
    "urn:ietf:params:scim:api:messages:2.0:Error"
  ],
  "detail": "The specified filter syntax was invalid, or the specified attribute and filter comparison combination is not supported:\nUnexpected operator 'pr'.\nInput: 'primaryEmail co \"gsar\"'\n",
  "status": "400",
  "scimType": "invalidFilter"
}