Also just realised while looking at the docs it works for search as well as replacement, with:
:S/textToFind
matching all of textToFind TextToFind texttofind TEXTTOFIND
But not TeXttOfFiND.
Golly!
:S/textToFind
matching all of textToFind TextToFind texttofind TEXTTOFIND
But not TeXttOfFiND.
Golly!
In my setup, `/foo` will match `FoO` and so on, but `/Foo` will only match `Foo`