Jilles Tjoelker f390d8d927 expr(1): Add sh(1) versions of examples, remove an incorrect example.
The three examples are better done using sh(1) itself these days.

The example
  expr -- "$a" : ".*"
is incorrect in the general case, as "$a" may be an operator.

MFC after:	2 weeks
2010-09-09 21:59:53 +00:00
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