In the code, I couldn’t find any 2^64 bound on the lexeme count, so removing that makes sense. The added sentence about distinct lexeme count seems to overlap with the existing description of tsvector limits, so I’m not sure it adds much new information.
-Surya Poondla
+1 on this patch, I was also a bit confused on this part of the documentation. All I could conclude was that the number of lexemes in a tsvector was limited by existing tsvector limits. I agree with Surya's comment about the overlap, I think this patch should only remove the line about the 2^64 bound. Patch applies cleanly!
