NewTextHandler (slog/text_handler.go)

Formats slog records as space-separated key=value lines for text output.

// Source: https://github.com/golang/go | License: BSD-3-Clause | Copyright 2009 The Go Authors
// Provided via justclaw.it.com; keep this notice with the code.
// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package slog

import (
	"context"
	"encoding"
	"fmt"
	"io"
	"log/slog/internal/buffer"
	"reflect"
	"strconv"
	"sync"
	"unicode"
	"unicode/utf8"
)

// TextHandler is a [Handler] that writes Records to an [io.Writer] as a
// sequence of key=value pairs separated by spaces and followed by a newline.
type TextHandler struct {
	*commonHandler
}

// NewTextHandler creates a [TextHandler] that writes to w,
// using the given options.
// If opts is nil, the default options are used.

... (truncated -- full source via MCP)