cmd/internal: use fmt.Fprintf

Change-Id: Ifa78c98bf919ea62136f19b2bad0a8ee33afc646
Reviewed-on: https://go-review.googlesource.com/c/go/+/435695
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Run-TryBot: xie cui <523516579@qq.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>

diff --git a/src/cmd/internal/test2json/test2json.go b/src/cmd/internal/test2json/test2json.go
index d8b870f256ed2c782a99da6cd434cc57841e3a2a..6beadae8598e248430ca484a47b8334bf52cfad5 100644 (file)
--- a/src/cmd/internal/test2json/test2json.go
+++ b/src/cmd/internal/test2json/test2json.go
@@ -343,7 +343,7 @@ func (c *Converter) writeEvent(e *event) {
        js, err := json.Marshal(e)
        if err != nil {
                // Should not happen - event is valid for json.Marshal.
-               c.w.Write([]byte(fmt.Sprintf("testjson internal error: %v\n", err)))
+               fmt.Fprintf(c.w, "testjson internal error: %v\n", err)
                return
        }
        js = append(js, '\n')