New changes in line with your comments:

• <DisabledTooltip>Infantry Hoplites only, requires at least 10.</DisabledTooltip> → <DisabledTooltip>Requires at least 10 Infantry Hoplites.</DisabledTooltip>, and similar cases in binaries/data/mods/public/simulation/templates/special/formations/*.xml.
• Insufficient resources → Requires more resources, in binaries/data/mods/public/simulation/components/Player.js.
• Removed all requirementsTooltips from binaries/data/mods/public/simulation/data/technologies/*.json. They'll now be generated automatically.

Please don't hate me for this, but I do find the "Trained by" useful. The "Builds" is also useful to check for example if a unit that you haven't trained yet will be able to build a certain structure. I certainly wouldn't be happy with the format, as that brick of plain text doesn't make it easy to find the information you may be looking for.

I've renamed it to 'objection', I think 'warning' might be too general (not everything that could be considered a warning should appear in red), but I came up with the name thanks to your suggestion. I hope I have now changed the coloredText(..., "red") where needed. Thanks!

In D4899#209226, @Freagarach wrote:

Thank you for the patch! I have one comment, which should be easy to do because of the function you used. :)
Also, @Stan has added you to the contributors group, so next time you upload a patch our linter will be run against your diff.

Use g_TooltipTextFormats.