Crash when logging with empty string: `unhandled exception: index out of bounds: 1..42 notin 0..41 [IndexDefect]`

[tersec]

import chronicles
info "B"
info ""

results in

INF 2025-08-12 01:29:21.788+00:00 B                                          tid=442905
nimbus-eth2/vendor/nim-chronicles/chronicles/textlines.nim(282) w
nimbus-eth2/vendor/nim-chronicles/chronicles/textlines.nim(153) initLogRecord
nimbus-eth2/vendor/nimbus-build-system/vendor/Nim/lib/system/fatal.nim(53) sysFatal
Error: unhandled exception: index out of bounds: 1..42 notin 0..41 [IndexDefect]

Presumably due to

nim-chronicles/chronicles/textlines.nim

Lines 152 to 153 in 18ecd73

	if msg.len < msgWidth:
	r.stream.write(spaces.toOpenArray(1, msgWidth - msg.len))