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PDGREPPE Replace Escape Symbol

The escape symbol is a standard backslash '\'.

 \<char> next symbol in [{}%+?-&:,] is MAGIC (option -kE)

 \<char> next symbol in [{}%+?-&:,] is Literal

Exclude symbol(s) options -kE or -kX<d> can be used when
working with patterns that might have numerous special edit
symbols such as any of:

	"{}%+?-&:,"

This works like the pattern matching options -E and -jX<d>
explained previously but only affects the "magic" symbols
used by EDIT or Replace functions.


	pdgreppe ` -kekwkr"{}%+?-&:," file_id.diz


...results in errors since any of "{}%+?-&:," have magic
rules for replacement.


	pdgreppe ` -kE -kekwkr"{}%+?-&:," file_id.diz


...allows literal placement of "{}%+?-&:," at front of file (`).

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