I am guessing some script or tool used upstream is doing an unsafe
search-and-replace for '@' with TAB, and accidentally changing these.
They seem to have been creeping into the repo for years.
I produced this fix commit automatically with:
sed -i 's|\t\([bcdgmnoruwyBCDGMRWY]\)|@\1|g' tba/*/*.*
...and then a few files' changes had to be undone.
I looked through all of the rest, and they look like correct fixes.
I also ran all the other letters, and they only make incorrect "fixes".
Added Ultima Zone 555 and 556. Originally by Casret, rebuilt by Parna.
Made MEDIT column menu's consistent with other OLC menu's.
added TEDIT access to bugs, typos, and ideas file.
[Oct 09 2009] - Rumble
Added connected_type "Preference Edit" (thanks Maoliosa)
[Oct 10 2007] - Rumble
Added OLC menu options for Copying. The Xcopy option is still available for GODs and above.
Player table is now created if it does not exist. (thanks Rhade)
[Oct 08 2007] - Rumble
Removed top_shop_offset variable, hopefully fixing the infamous sedit bug.
Fixed memory leaks from not freeing new zone builders and new zone commands. (thanks Neme)