Motivation / Problem

See #9203; that PR was incomplete.

Description

grep -Rn '([^C]him' src | grep -v src/lang
grep -Rn '[^Ttm]his[^t]' src | grep -v src/lang
grep -Rn '[^Ttgcs]her[^ie]' src | grep -v src/lang
grep -Rn 'boy' src | grep -v src/lang
grep -Rn '[^iaeou]she' src | grep -v src/lang
grep -Rn '[^sTtwWS_cC>p]he[^srlaixuc]' src | grep -v src/lang
And then some further manual filtering.

Limitations

COPYING.md is kept untouched. Similarly pronouns referring to actual persons have been left alone as well, e.g. Josef Drexler - For his great work on TTDPatch.

Checklist for review

Some things are not automated, and forgotten often. This list is a reminder for the reviewers.

• The bug fix is important enough to be backported? (label: 'backport requested')
• This PR affects the save game format? (label 'savegame upgrade')
• This PR affects the GS/AI API? (label 'needs review: Script API')
  • ai_changelog.hpp, gs_changelog.hpp need updating.
  • The compatibility wrappers (compat_*.nut) need updating.
• This PR affects the NewGRF API? (label 'needs review: NewGRF')
  • newgrf_debug_data.h may need updating.
  • PR must be added to API tracker