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Guy Gastineau
2ca99e9de7
The section on character groups clearly states "To include a literal
-, make it the first or last character, ..."
In the example `Block domains without subdomains` the bounded
character group `[\-]{1}` should be `[-]{1}` if the intention is to match a
literal `-` as suggested by the accompanying description.
Signed-off-by: Guy Gastineau <strings.stringsandstrings@gmail.com>