Unaligned calendar with locale that has shorter day abbreviations then 3 letters

[wereii]

• output of awesome -v and lua -v

  > awesome -v
  awesome v4.3-1315-g1932bd017 (Too long)
  • Compiled against Lua 5.3.6 (running with Lua 5.3)
  • API level: 4
  • D-Bus support: yes
  • xcb-errors support: yes
  • execinfo support: yes
  • xcb-randr version: 1.6
  • LGI version: 0.9.2
  • Transparency enabled: yes
  • Custom search paths: no

> lua -v
Lua 5.4.3  Copyright (C) 1994-2021 Lua.org, PUC-Rio

• expected behavior and actual behavior Expected that the day names are aligned with day numbers, not like in screenshot:

• steps to reproduce the problem:

os.setlocale("cs_CZ.UTF-8")

Possibly has to do something with: https://github.com/lcpz/lain/issues/426