Errors in Part 4 RNC schemas in the consolidated Part 4

[MURATA Makoto (FAMILY Given)]

> 
> B.1. wml.rnc
> 
> Replace w_CT_MathCtrlDel in the def of w_EG_RPrMath
> by w_CT_MathCtrlIns

My mistake.  I withdraw this comment.

Cheers,
Makoto