Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/14934#discussion_r77380815
--- Diff: R/pkg/R/functions.R ---
@@ -2876,7 +2876,8 @@ setMethod("randn", signature(seed = "numeric"),
#' regexp_extract
#'
-#' Extract a specific(idx) group identified by a java regex, from the
specified string column.
+#' Extract a specific \code{idx} group identified by a Java regex, from
the specified string column.
--- End diff --
I noticed that - I thought `@param idx a group index` isn't super
descriptive on what it is
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