fix error formatting

would interpret % as printf formatted strings

Signed-off-by: Steven Chung <[email protected]>

pkg/cmd/errors.go

@@ -27,7 +27,7 @@ import (
 func CheckError(err error) {
 	if err != nil {
 		if err != context.Canceled {
-			fmt.Fprintf(os.Stderr, fmt.Sprintf("An error occurred: %v\n", err))
+			fmt.Fprintf(os.Stderr, "An error occurred: %q\n", err)
 		}
 		os.Exit(1)
 	}