archive: use strings.Builder

Change-Id: I07e022ffc022bca6aa12165871e723db3ed83141
Reviewed-on: https://go-review.googlesource.com/c/go/+/428255
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>

diff --git a/src/archive/tar/writer_test.go b/src/archive/tar/writer_test.go
index da3fb89e65e51ecd17627d444af95b68e54f4596..48f35e5133cf78bb4066bf0a56d5d17b07808898 100644 (file)
--- a/src/archive/tar/writer_test.go
+++ b/src/archive/tar/writer_test.go
@@ -1252,7 +1252,7 @@ func TestFileWriter(t *testing.T) {
 
        for i, v := range vectors {
                var wantStr string
-               bb := new(bytes.Buffer)
+               bb := new(strings.Builder)
                w := testNonEmptyWriter{bb}
                var fw fileWriter
                switch maker := v.maker.(type) {

diff --git a/src/archive/zip/zip_test.go b/src/archive/zip/zip_test.go
index ead9cd3aab991fc59b5725e52c3cb7bc85514521..a4b952efcc6ce05cfa663366267b2ad0224bd006 100644 (file)
--- a/src/archive/zip/zip_test.go
+++ b/src/archive/zip/zip_test.go
@@ -24,7 +24,7 @@ func TestOver65kFiles(t *testing.T) {
        if testing.Short() && testenv.Builder() == "" {
                t.Skip("skipping in short mode")
        }
-       buf := new(bytes.Buffer)
+       buf := new(strings.Builder)
        w := NewWriter(buf)
        const nFiles = (1 << 16) + 42
        for i := 0; i < nFiles; i++ {