only return err when not nil, for easier readability

environments.go

@@ -84,7 +84,7 @@ func (s *EnvironmentsService) ListEnvironments(pid interface{}, opts *ListEnviro
 		return nil, resp, err
 	}
 
-	return envs, resp, err
+	return envs, resp, nil
 }
 
 // GetEnvironment gets a specific environment from a project.
@@ -109,7 +109,7 @@ func (s *EnvironmentsService) GetEnvironment(pid interface{}, environment int, o
 		return nil, resp, err
 	}
 
-	return env, resp, err
+	return env, resp, nil
 }
 
 // CreateEnvironmentOptions represents the available CreateEnvironment() options.
@@ -147,7 +147,7 @@ func (s *EnvironmentsService) CreateEnvironment(pid interface{}, opt *CreateEnvi
 		return nil, resp, err
 	}
 
-	return env, resp, err
+	return env, resp, nil
 }
 
 // EditEnvironmentOptions represents the available EditEnvironment() options.
@@ -182,7 +182,7 @@ func (s *EnvironmentsService) EditEnvironment(pid interface{}, environment int,
 		return nil, resp, err
 	}
 
-	return env, resp, err
+	return env, resp, nil
 }
 
 // DeleteEnvironment removes an environment from a project team.
@@ -225,6 +225,6 @@ func (s *EnvironmentsService) StopEnvironment(pid interface{}, environmentID int
 	if err != nil {
 		return nil, resp, err
 	}
-	
+
 	return env, resp, nil
 }