Simplify error handling syntax

clip/copy_WIN.go

@@ -12,8 +12,7 @@ import (
 // CopyString copies a string to the clipboard.
 func CopyString(clearClipboardAutomatically bool, copySubject string) error {
 	cmd := exec.Command("powershell.exe", "-c", fmt.Sprintf("echo '%s' | Set-Clipboard", strings.ReplaceAll(copySubject, "'", "''")))
-	err := cmd.Run()
-	if err != nil {
+	if err := cmd.Run(); err != nil {
 		return errors.New("unable to copy to clipboard: " + err.Error())
 	}
 	if clearClipboardAutomatically {