Duplicated colon was removed (#17988)

Hope this help :-)

docs/reference/query-dsl/range-query.asciidoc

@@ -34,7 +34,7 @@ The `range` query accepts the following parameters:
 ==== Ranges on date fields
 
 When running `range` queries on fields of type <<date,`date`>>, ranges can be
-specified using <<date-math>>::
+specified using <<date-math>>:
 
 [source,js]
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