Method Fmt

internal/entryhuman/entry.go:202–338

(buf *bytes.Buffer, termW io.Writer, ent slog.SinkEntry)

}

func (f Formatter) Fmt(buf *bytes.Buffer, termW io.Writer, ent slog.SinkEntry) {
	reset(buf, termW)

	// Timestamp + space
	buf.WriteString(render(termW, timeStyle, ent.Time.Format(TimeFormat)))
	buf.WriteString(" ")

	// Level label + two spaces
	lvl := bracketedLevel(ent.Level) // e.g. "[debu]", "[info]"
	buf.WriteString(render(termW, levelStyle(ent.Level), lvl))
	buf.WriteString("  ")

	// Logger names: name1.name2.name3: (no strings.Join allocation)
	if len(ent.LoggerNames) > 0 {
		for i, name := range ent.LoggerNames {
			if i > 0 {
				buf.WriteString(".")
			}
			buf.WriteString(quoteKey(name))
		}
		buf.WriteString(": ")
	}

	// Message (detect multiline)
	var multilineKey string
	var multilineVal string
	msg := strings.TrimSpace(ent.Message)
	if strings.Contains(msg, "\n") {
		multilineKey = "msg"
		multilineVal = msg
		msg = quote("...")
	}
	buf.WriteString(msg)

	keyStyle := timeStyle
	equalsStyle := timeStyle

	// Write trace/span directly (do not mutate ent.Fields)
	if ent.SpanContext.IsValid() {
		buf.WriteString(tab)

		buf.WriteString(render(termW, keyStyle, quoteKey("trace")))
		buf.WriteString(render(termW, equalsStyle, "="))
		buf.WriteString(ent.SpanContext.TraceID().String())
		buf.WriteString(tab)
		buf.WriteString(render(termW, keyStyle, quoteKey("span")))
		buf.WriteString(render(termW, equalsStyle, "="))
		buf.WriteString(ent.SpanContext.SpanID().String())
	}

	// Find a multiline field without mutating ent.Fields.
	multiIdx := -1
	for i, fld := range ent.Fields {
		if multilineVal != "" {
			break
		}
		var s string
		switch v := fld.Value.(type) {