Under the BASIC REGULAR EXPRESSIONS section of the
re_format(7) man page, there is a bulleted list of the ways basic regular expressions differ from extended regular expressions, one of which is:
Quote:
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'*' is an ordinary character if it appears at the beginning of [a basic] RE or the beginning of a parenthesized subexpression (after a possible leading '^').
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I don't see how this is different from the use of '*' in an extended RE.