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-rw-r--r--Doc/Zsh/compwid.yo8
1 files changed, 6 insertions, 2 deletions
diff --git a/Doc/Zsh/compwid.yo b/Doc/Zsh/compwid.yo
index a87aeac87..cbc14715c 100644
--- a/Doc/Zsh/compwid.yo
+++ b/Doc/Zsh/compwid.yo
@@ -944,8 +944,12 @@ matching system does not yet handle multibyte characters, this is likely
 to be a future extension, at which point this syntax will handle
 arbitrary alphabets; hence this form, rather than the use of explicit
 ranges, is the recommended form.  In other cases
-`tt([:)var(name)tt(:])' forms are allowed, but imply no special
-constraint on the characters beyond that implied by the test itself.
+`tt([:)var(name)tt(:])' forms are allowed.  If the two forms on the left
+and right are the same, the characters must match exactly.  In remaining
+cases, the corresponding tests are applied to both characters, but they
+are not otherwise constrained; any matching character in one set goes
+with any matching character in the other set:  this is equivalent to the
+behaviour of ordinary character classes.
 
 The pattern var(tpat) may also be one or two stars, `tt(*)' or
 `tt(**)'. This means that the pattern on the command line can match