Parser Error Number Bugfix by Nathanael Nerode

In version 6M62 of Inform 7, there is a nasty bug in Standard Rules by Graham Nelson which swaps the I7 names of two error messages.

referred to a determination of scope error - NOTINCONTEXT_PE
noun did not make sense in that context error - ASKSCOPE_PE

This fixes the bug by swapping the error numbers in the I6 template code. (This was less invasive than replacing the defective section of Standard Rules.)