Better examples for .basename and .dirname

Old examples were not as clear as they could have been, and did not
show examples for all the cases the user may want to know the result of.

Author: samcv

doc/Type/IO/Path.pod6

@@ -55,7 +55,7 @@ Returns the absolute path as a string.
 Returns the basename part of the path object. That is, it returns the name of
 the file relative to its directory.
 
-    say IO::Path.new("/etc/passwd").basename;   # passwd
+    say IO::Path.new("docs/README.pod").basename;   # README.pod
 
 =head2 method extension
 
@@ -72,7 +72,9 @@ Returns the extension (if any) of the path object.
 Returns the directory name portion of the path object. That is, it returns
 the path excluding the volume and the base name.
 
-    say IO::Path.new("/etc/passwd").dirname;    # /etc
+    say IO::Path.new("/home/camelia/myfile.p6").dirname;    # /home/camelia
+    say IO::Path.new("/home/camelia").dirname;              # /home
+    say IO::Path.new("/home").dirname;                      # /
 
 =head2 method volume