[io grant] Explicitly spell out caveats of IO::Path.Str

Author: zoffixznet

doc/Type/IO/Path.pod6

@@ -240,7 +240,11 @@ values the return values of the methods with the same names.
 
     method Str(IO::Path:D: --> Str)
 
-Alias for L«C<IO::Path.path>|/routine/path».
+Alias for L«C<IO::Path.path>|/routine/path». In particular, note that default
+stringification of an C<IO::Path> does B<NOT> use the value of
+L«C<$.CWD> attribute|type/IO::Path#attribute_CWD». To stringify while
+retaining full path infomation use L«C<.absolute>|/routine/absolute» or
+L«C<.relative>|/routine/relative» methods.
 
 =head2 method open