Snippet paths include server URL paths

[erunion]

If a server URL includes a base like http://petstore.swagger.io/v1, snippets generated from it will include /v1:

const sdk = require('api')('https://example.com/openapi.json');
    
sdk.get('/v1/pets/petId')
  .then(res => res.json())
  .then(res => {
    console.log(res);
  });

This only a problem for operations that don't have an operation ID.