[bug #18633] regular expressions case-insensitivity

[Benno Schulenberg]

Follow-up Comment #3, bug #18633 (project grep):

> I've also tested LC_ALL-en_US.UTF-8 and this suffers from the
> same problem.

Well, it's not really a problem, it's how it's supposed to work.

> http://www.gnu.org/software/grep/doc/grep_8.html#IDX178
> "It matches any single character that sorts between the two
> characters, inclusive, using the locale's collating sequence 
> and character set"

Read on a bit: "Many locales sort characters in dictionary order, and in
these locales `[a-d]' is typically not equivalent to `[abcd]'; it might be
equivalent to `[aBbCcDd]', for example."

If you do not like that ordering, set somewhere in your startup or login
scripts 'export LC_COLLATE=POSIX'.



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