I enter a code like WRn in a calc column, and it gets automatically converted to Wrn (the upper case R is converted to lower case r)-- but in my application, preserving the case of all characters is important.
Is there a way to enforce the preservation of case in a spreadsheet column?
(Note that the case conversions don’t always occur, but seem to depend on the particular combination of letters I enter.)
Thanks for any hints!

But there are other shades of grey. And well, it’s a usual thing when user types a word starting with an uppercase letter (and does not rely on automatic uppercasing in the beginning of a sentence - note that user explicitly expresses the intention! Nice, isn’t it!) - but making a mechanical mistake, releases the