[DOCS] Document missing flag
values for regexp
query #82265
Merged
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Documents the
EMPTY
andNONE
flag
values for theregexp
query.Also documents the
""
(empty string) value, which is an alias forALL
.Closes #81978.
Preview
https://elasticsearch_82265.docs-preview.app.elstc.co/guide/en/elasticsearch/reference/master/regexp-syntax.html#_valid_values