Add explict syntax for using pattern parser (#3871)

* Add explict syntax for using `pattern` parser Motivation is from community discussion https://community.grafana.com/t/how-to-use-loki-pattern-parser/49195 * Update docs/sources/logql/_index.md Co-authored-by: Owen Diehl <ow.diehl@gmail.com> Co-authored-by: Owen Diehl <ow.diehl@gmail.com>
grafana · Jun 22, 2021 · b77bb56 · b77bb56
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commit b77bb56
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diff --git a/docs/sources/logql/_index.md b/docs/sources/logql/_index.md
@@ -280,7 +280,7 @@ will get those labels extracted:
 
 ##### Pattern
 
-The pattern parser allows the explicit extraction of fields from log lines by defining a pattern expression. The expression matches the structure of a log line.
+The pattern parser allows the explicit extraction of fields from log lines by defining a pattern expression (`| pattern "<pattern-expression>"`). The expression matches the structure of a log line.
 
 Consider this NGINX log line.