String Interpolation Broken when Generating URL

[mthongvanh]

Commit 7faaed1927d0c003d51045b6e23bfda8c25ee5e8 breaks string interpolation for a path defined as follows: @Post(path: "https://{domain}api.website.com/user/auth")

It generates the following url:
https://$domainapi.website.com/user/auth
instead of the desired url:
https://${domain}api.website.com/user/auth