cmd/cover: use strings.Builder

Change-Id: Ifb51cb4ed98a93742ce4b221137a0ad73b939b06
Reviewed-on: https://go-review.googlesource.com/c/go/+/428286
Run-TryBot: Ian Lance Taylor <iant@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

diff --git a/src/cmd/cover/cover_test.go b/src/cmd/cover/cover_test.go
index 28be23112171076358ecef4a19de355b1be399ce..d9d63e4587f0bee7a0b1cb2b8eef90fa152c3092 100644 (file)
--- a/src/cmd/cover/cover_test.go
+++ b/src/cmd/cover/cover_test.go
@@ -400,7 +400,7 @@ func TestCoverHTML(t *testing.T) {
        if err != nil {
                t.Fatal(err)
        }
-       var out bytes.Buffer
+       var out strings.Builder
        scan := bufio.NewScanner(bytes.NewReader(entireHTML))
        in := false
        for scan.Scan() {

diff --git a/src/cmd/cover/html.go b/src/cmd/cover/html.go
index 3c1d17e7b956af110d816bc58a7a7878a0e411ec..400a7d879d0f6572d0825e46a0beb95c60fbcebc 100644 (file)
--- a/src/cmd/cover/html.go
+++ b/src/cmd/cover/html.go
@@ -6,7 +6,6 @@ package main
 
 import (
        "bufio"
-       "bytes"
        "cmd/internal/browser"
        "fmt"
        "html/template"
@@ -157,7 +156,7 @@ func rgb(n int) string {
 
 // colors generates the CSS rules for coverage colors.
 func colors() template.CSS {
-       var buf bytes.Buffer
+       var buf strings.Builder
        for i := 0; i < 11; i++ {
                fmt.Fprintf(&buf, ".cov%v { color: %v }\n", i, rgb(i))
        }