Clarifies deprecation :count refs #2632

Author: JJ

doc/Type/Str.pod6

@@ -556,7 +556,7 @@ non-C<Infinity> value:
 
     say <not there yet>.join("\n").lines( 2 ); # OUTPUT: «(not there)␤»
 
-B«DEPRECATED as of C<6.d> language», the C<:count> argument can be used
+B«DEPRECATED as of C<6.d> language», the C<:count> argument was used
 to return the total number of lines:
 
     say <not there yet>.join("\n").lines( :count ); # OUTPUT: «3␤»