Clarify that {a="b",a!="c"} is possible.
@@ -95,8 +95,9 @@ For example, this selects all `http_requests_total` time series for `staging`,
http_requests_total{environment=~"staging|testing|development",method!="GET"}
-Label matchers that match empty label values also select all time series that do
-not have the specific label set at all. Regex-matches are fully anchored.
+Label matchers that match empty label values also select all time series that
+do not have the specific label set at all. Regex-matches are fully anchored. It
+is possible to have multiple matchers for the same label name.
Vector selectors must either specify a name or at least one label matcher
that does not match the empty string. The following expression is illegal:
