server: Strip ANSI escape codes from browser error log

Fixes #13037

common/loggers/handlerterminal_test.go

@@ -0,0 +1,40 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+// Some functions in this file (see comments) is based on the Go source code,
+// copyright The Go Authors and  governed by a BSD-style license.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package loggers
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/bep/logg"
+	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/common/terminal"
+)
+
+func TestNoAnsiEscapeHandler(t *testing.T) {
+	c := qt.New(t)
+
+	test := func(s string) {
+		c.Assert(stripANSI(terminal.Notice(s)), qt.Equals, s)
+	}
+	test(`error in "file.md:1:2"`)
+
+	var buf bytes.Buffer
+	h := newNoAnsiEscapeHandler(&buf, &buf, false, nil)
+	h.HandleLog(&logg.Entry{Message: terminal.Notice(`error in "file.md:1:2"`), Level: logg.LevelInfo})
+
+	c.Assert(buf.String(), qt.Equals, "INFO  error in \"file.md:1:2\"\n")
+}