I don't know if some people will be interested but i created an html page to have a more friendly way to create the "Upgrades Text" section of weapons.
Link: http://hexaheart.github.io/dark-souls-3-weapon-builder/weapon-builder.html
You can import an existing "Upgrade Text" by pasting into the textarea at the bottom of the page and clicking the "▲ import" button.
Clicking on the tab name displays the stats for the given infusion.
You can enable / disable every tab by clicking on the tick / cross : use that for special upgrades with Titanite Scales or Twinkling Titanite.
When you're down, click on the "▼ export" button and copy/past the textarea into the "Upgrade Text" of the wiki.
You can access the sources on github by following this link: https://github.com/hexaheart/dark-souls-3-weapon-builder/ .
The project was under "unlicense" licence.
Feel free to do whatever you want with it and report any bug encountered.