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determineexprtype_re_1
was modified to remove extraneouscharacter class markers around a single
,
a similar change was applied for the word metacharacter
in
determineexprtype_re_2
anddetermineexprtype_re_3
the third character class in
determineexprtype_re_3
wassimplified to remove an escape sequence--by placing the
-
at the start of the character class its metacharacterstatus can be avoided