[Docs] Fix typo in pattern-tokenizer.asciidoc
@@ -111,7 +111,7 @@ The `pattern` tokenizer accepts the following parameters:
`flags`::
Java regular expression http://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html#field.summary[flags].
- lags should be pipe-separated, eg `"CASE_INSENSITIVE|COMMENTS"`.
+ Flags should be pipe-separated, eg `"CASE_INSENSITIVE|COMMENTS"`.
`group`::
