Merge pull request #61523 from dixudx/formatter_escape_percent_sign

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

escape literal percent sign when formatting

**What this PR does / why we need it**:

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #61503

**Special notes for your reviewer**:
/assign @janetkuo @liggitt 
/cc @kubernetes/sig-cli-bugs 

**Release note**:

```release-note
escape literal percent sign when formatting
```

pkg/kubectl/explain/formatter.go

@@ -48,7 +48,11 @@ func (f *Formatter) Write(str string, a ...interface{}) error {
 	for i := 0; i < f.IndentLevel; i++ {
 		indent = indent + " "
 	}
-	_, err := io.WriteString(f.Writer, indent+fmt.Sprintf(str, a...)+"\n")
+
+	if len(a) > 0 {
+		str = fmt.Sprintf(str, a...)
+	}
+	_, err := io.WriteString(f.Writer, indent+str+"\n")
 	return err
 }