fix linter errors

cmd/config.go

@@ -199,7 +199,7 @@ func (conf *Config) WriteConfigFile() (string, error) {
 	cfgfile := filepath.Join(conf.GetConfigDir(), "config.toml")
 
 	if FileExists(cfgfile) {
-		return "", fmt.Errorf("config file %s already exists.", cfgfile)
+		return "", fmt.Errorf("config file %s already exists", cfgfile)
 	}
 
 	var kloader = koanf.New(".")

cmd/root.go

@@ -58,7 +58,11 @@ func Execute(output io.Writer) int {
 			return Die(err)
 		}
 
-		fmt.Fprintln(output, msg)
+		_, err = fmt.Fprintln(output, msg)
+		if err != nil {
+			return Die(fmt.Errorf("failed to print to output: %s", err))
+		}
+
 		return 0
 	}