added more detail to function comment

github/apps.go

@@ -358,7 +358,9 @@ func (s *AppsService) CreateInstallationToken(ctx context.Context, id int64, opt
 	return t, resp, nil
 }
 
-// CreateInstallationTokenListRepos creates a new installation token with an empty repository list as a parameter.
+// CreateInstallationTokenListRepos creates a new installation token with a list of all repositories in an installation which is not possible with CreateInstallationToken.
+//
+// differs from CreateInstallationToken by taking InstallationTokenListRepoOptions as a parameter which does not omit RepositoryIDs if that field is nil or an empty array.
 //
 // GitHub API docs: https://docs.github.com/rest/apps/apps#create-an-installation-access-token-for-an-app
 //