gen-config: port() gets its output chomp’d.

src/gen-config.cr

@@ -69,7 +69,7 @@ class Configure::Context
 		options["environment"] = ENV["ENVIRONMENT"]? || ""
 		options["port"] = Crinja.function do
 			service = (arguments.varargs[0]? || "").to_s.gsub /\//, ':'
-			`get-port #{service}`
+			`get-port #{service}`.chomp
 		end
 		options["random_password"] = Crinja.function do
 			id = (arguments.varargs[0]? || options["id"]).to_s