@MavenRepository with credentials fails on spaces around equals sign

[exaV]

Resolving dependencies fails if I use spaces around the = sign

this will fail (notices the spaces around the equals sign after user and password
// @file:MavenRepository("my-art", "http://localhost:8081/artifactory/authenticated_repo", user = "auth_user", password = "password")

without spaces it works
// @file:MavenRepository("my-art", "http://localhost:8081/artifactory/authenticated_repo", user="auth_user", password="password")

Unfortunately most auto-formatters will add the spaces around the equals sign, which makes the syntax currently unusable.

On a sidenote: Without specifying user= and password= the options are ignored altogether (repository is used but without authentication). I am not sure whether this is intended.

[exaV]

relates to #214