s/&by/&custom-routine-to-use/

To avoid people thinking it's a named arg.

Author: zoffixznet

doc/Type/Any.pod6

@@ -129,7 +129,7 @@ Examples:
 Defined as:
 
     multi method sort()
-    multi method sort(&by)
+    multi method sort(&custom-routine-to-use)
 
 Sorts iterables with C<infix:<cmp>> or given code object and returns a new C<List>.
 Optionally, takes a L<Callable> as a positional parameter, specifying how to
@@ -433,7 +433,7 @@ Coerce the invocant first to a C<List> and then to a L<Supply|/type/Supply>.
 Defined As:
 
     multi method min(--> Any:D)
-    multi method min(&by --> Any:D)
+    multi method min(&custom-routine-to-use --> Any:D)
 
 Coerces to Iterable and returns the numerically smallest element. If a
 C<Callable> positional argument is provided it is called with each element
@@ -444,7 +444,7 @@ and its smallest return values is returned.
 Defined As:
 
     multi method max(--> Any:D)
-    multi method max(&by --> Any:D)
+    multi method max(&custom-routine-to-use --> Any:D)
 
 Coerces to Iterable and returns the numerically biggest element. If a
 C<Callable> positional argument is provided it is called with each element
@@ -455,7 +455,7 @@ and its biggest return values is returned.
 Defined As:
 
     multi method minmax(--> List:D)
-    multi method minmax(&by --> List:D)
+    multi method minmax(&custom-routine-to-use --> List:D)
 
 Returns a list containing the smallest and the biggest element. If a
 C<Callable> positional argument is provided each element is filtered and