Matching rule with superfluous chars

[pherk]

It may be due to my lack of understanding as a non-expert in Open-API spec, but I have a basic problem.
My observation:

• given following rule in api.json

    "/Patient": {
      "get": {
        "tags": [
          "query",
          "Patient"
        ],
        "operationId": "npatient:search",
        "summary": "search Patient type",
        "parameters": [ 
  ...snip...

• rule is matched by url: $base/Patient12345
  My expectation would be that an error is thrown. Actually the slash is missing for another rule "/Patient/{id}".
  The function router:create-regexp seems anchoring at the beginning but not the end of string

regards
Peter