cmd/nm: use print-style not printf-style

Change-Id: Ic977026a99a825954117902051e59928de9ccbdb
Reviewed-on: https://go-review.googlesource.com/c/go/+/435947
Reviewed-by: Cherry Mui <[email protected]>
Run-TryBot: Cherry Mui <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
Run-TryBot: xie cui <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: cuiweixie

src/cmd/nm/nm.go

@@ -29,7 +29,7 @@ const helpText = `usage: go tool nm [options] file...
 `
 
 func usage() {
-	fmt.Fprintf(os.Stderr, helpText)
+	fmt.Fprint(os.Stderr, helpText)
 	os.Exit(2)
 }