vim-patch:9.1.1219: Strange error with wrong type for matchfuzzy() "camelcase"

Problem:  Strange error with type for matchfuzzy() "camelcase".
Solution: Show the error "Invalid value for argument camelcase" instead
          of "Invalid argument: camelcase" (zeertzjq).

Note that using tv_get_string() will lead to confusion, as when the
value cannot be converted to a string tv_get_string() will also give an
error about that, but "camelcase" takes a boolean, not a string.  Also
don't use tv_get_string() for the "limit" argument above.

closes: vim/vim#16926

c4815c157b

src/nvim/eval.lua

@@ -7152,7 +7152,7 @@ M.funcs = {
       		returned.  Zero means no limit.
           camelcase	Use enhanced camel case scoring making results
       		better suited for completion related to
-      		programming languages. Default is v:true
+      		programming languages.  Defaults to v:true.
 
       If {list} is a list of dictionaries, then the optional {dict}
       argument supports the following additional items: