b.grow(n)
	}
}

// Write appends the contents of p to b's buffer.
// Write always returns len(p), nil.
func (b *Builder) Write(p []byte) (int, error) {
	b.copyCheck()
	b.buf = append(b.buf, p...)
	return len(p), nil
}

// WriteByte appends the byte c to b's buffer.
// The returned error is always nil.
func (b *Builder) WriteByte(c byte) error {
	b.copyCheck()
	b.buf = append(b.buf, c)
	return nil
}

        ["1"]       | _             | _             | "append missing, then add"                        | { it.append(notDefined()) ; it.add("1") }
        ["1"]       | ["0"]         | _             | "add missing to non-empty value, then append"     | { it.add(notDefined()) ; it.append("1") }

	_ = append(s, "foo"...)
	_ = append(S(s), "foo" /* ERRORx `cannot use .* in argument to append` */ )
	_ = append(S(s), "foo"...)
	_ = append(s, t /* ERROR "cannot use t" */ )
	_ = append(s, t...)
	_ = append(s, T("foo")...)
	_ = append(S(s), t /* ERROR "cannot use t" */ )
	_ = append(S(s), t...)
	_ = append(S(s), T("foo")...)
	_ = append([]string{}, t /* ERROR "cannot use t" */ , "foo")
	_ = append([]T{}, t, "foo")
}

				if inquote && len(cmd) > 1 && cmd[1] == '"' {
					b = append(b, c)
					cmd = cmd[1:]
				}
				inquote = !inquote
			} else {
				b = append(b, c)
			}
			nslash = 0
			continue
		case '\\':
			nslash++
			continue
		}
		b = appendBSBytes(b, nslash)
		nslash = 0
		b = append(b, c)
	}
	return appendBSBytes(b, nslash), ""
}

	p.doPrintf(format, a)
	s := string(p.buf)
	p.free()
	return s
}

// Appendf formats according to a format specifier, appends the result to the byte
// slice, and returns the updated slice.
func Appendf(b []byte, format string, a ...any) []byte {
	p := newPrinter()
	p.doPrintf(format, a)
	b = append(b, p.buf...)
	p.free()
	return b
}

// These routines do not take a format string

		mayAppendNewline = func(b []byte) []byte { return append(b, '\n') }
	}

	b = append(b, '{')
	b = mayAppendNewline(b)
	first := true
	v.Do(func(kv KeyValue) {
		if !first {
			b = append(b, ',', afterCommaDelim)
		}
		first = false
		b = appendJSONQuote(b, kv.Key)
		b = append(b, ':', ' ')
		switch v := kv.Value.(type) {
		case nil:
			b = append(b, "null"...)
		case jsonVar:
			b = v.appendJSON(b)

			if summary.Start != nil {
				rawEvents = append(rawEvents, summary.Start)
			}
			if summary.End != nil {
				rawEvents = append(rawEvents, summary.End)
			}
			rawEvents = append(rawEvents, summary.Logs...)
			for _, r := range summary.Regions {
				if r.Start != nil {
					rawEvents = append(rawEvents, r.Start)
				}
				if r.End != nil {
					rawEvents = append(rawEvents, r.End)
				}
			}

	if x >= 0x1000 {
		b = append(b, digits[x>>12])
	}
	if x >= 0x100 {
		b = append(b, digits[x>>8&0xf])
	}
	if x >= 0x10 {
		b = append(b, digits[x>>4&0xf])
	}
	return append(b, digits[x&0xf])
}

// appendHexPad appends the fully padded hex string representation of x to b.
func appendHexPad(b []byte, x uint16) []byte {

			data = append(data[0:0], r.remaining...)
			r.remaining = nil
			return n, nil
		}

		n = len(data)
		//nolint:staticcheck // SA4006,SA4010 underlying array of data is modified here.
		data = append(data[0:0], r.remaining[:n]...)
		r.remaining = r.remaining[n:]
		return n, io.ErrShortBuffer
	}

	// RawMessage#Unmarshal appends to data - we reset the slice down to 0 and will either see

				matched = true
			} else {
				out = append(out, errmsg)
			}
		}
		if !matched {
			errs = append(errs, fmt.Errorf("%s:%d: no match for %#q in:\n\t%s", we.file, we.lineNum, we.reStr, strings.Join(out[n:], "\n\t")))
			continue
		}
	}

	if len(out) > 0 {
		errs = append(errs, fmt.Errorf("Unmatched Errors:"))
		for _, errLine := range out {
			errs = append(errs, fmt.Errorf("%s", errLine))
		}
	}