Add additional precision to output histogram

Show a single decimal place for the percentages in the overview
histogram shown on completion.

main.go

@@ -52,14 +52,14 @@ func main() {
 		padding = "\n"
 	)
 	documents, output, err := run(os.Args)
-	if output != os.Stdout {
-		defer output.Close()
-		padding = ""
-	}
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "error: %v\n", err)
 		os.Exit(-1)
 	}
+	if output != os.Stdout {
+		defer output.Close()
+		padding = ""
+	}
 	duration := time.Since(start)
 
 	v := make(Visualizer)
@@ -560,9 +560,9 @@ func (v Visualizer) Render(title string, width int) string {
 	scaleFactor := float64(totalNumDocs) / float64(slicedMap[0].numDocsWithThisNumFiles)
 	for _, p := range slicedMap {
 		ratio := float64(p.numDocsWithThisNumFiles) / float64(totalNumDocs)
-		numChars := int(math.Ceil(ratio * float64(width-12) * scaleFactor))
+		numChars := int(math.Ceil(ratio * float64(width-14) * scaleFactor))
 		sb.WriteString(fmt.Sprintf(
-			"%3d | %s (%.0f%%)\n",
+			"%3d | %s (%.1f%%)\n",
 			p.numAssocFiles,
 			strings.Repeat("*", numChars),
 			float64(p.numDocsWithThisNumFiles)*100/float64(totalNumDocs),