Github user jiangxb1987 commented on a diff in the pull request:
https://github.com/apache/spark/pull/18814#discussion_r131858708
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/expressions/WindowSpec.scala ---
@@ -146,22 +146,22 @@ class WindowSpec private[sql](
/**
* Defines the frame boundaries, from `start` (inclusive) to `end`
(inclusive).
*
- * Both `start` and `end` are relative from the current row. For
example, "0" means "current row",
- * while "-1" means one off before the current row, and "5" means the
five off after the
- * current row.
+ * Both `start` and `end` are relative from the current row. For
example, "0" means
+ * "current row", while "-1" means one off before the current row, and
"5" means the five off
+ * after the current row.
--- End diff --
The original line length exceeds the 100 charactors limit...
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