[io grant] Document IO::Path.split

Author: zoffixznet

doc/Type/IO/Path.pod6

@@ -176,8 +176,18 @@ Defined as:
     method comb(IO::Path:D: |args --> Seq:D)
 
 Opens the file and processes its contents the same way
-L«C<Str.comb>|/type/Str» does, taking the same arguments. Implementations may
-slurp the file in its entirety when this method is called.
+L«C<Str.comb>|/type/Str#routine_comb» does, taking the same arguments.
+Implementations may slurp the file in its entirety when this method is called.
+
+=head2 method split
+
+Defined as:
+
+    method split(IO::Path:D: |args --> Seq:D)
+
+Opens the file and processes its contents the same way
+L«C<Str.split>|/type/Str#routine_split» does, taking the same arguments.
+Implementations may slurp the file in its entirety when this method is called.
 
 =head2 method extension