This is a request and further endorsement of a report from 2008, ending with https://lists.gnu.org/archive/html/bug-grep/2008-08/msg00002.html
Request: Either add four words to the manpage or delete the entire sentence. ASIS: "In GNU grep there is no difference in available functionality between basic and extended syntaxes." TOBE: "Although the syntaxes differ, in GNU grep there is no difference in available functionality between basic and extended syntaxes." Reasoning: The user should not suffer for not realizing that "no difference in available functionality" does not imply "no difference in syntax." Example: *$* *grep -i "([A-Z])\1\1" * grep: Invalid back reference #but no problem with: *$* *grep -i -E "([A-Z])\1\1"* or *$* *grep -i "\([A-Z]\)\1\1" * --- Thank you, *David A. Kra* __________________________________________________________________
