Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20618#discussion_r169182420
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
---
@@ -548,7 +575,13 @@ case class Sqrt(child: Expression) extends
UnaryMathExpression(math.sqrt, "SQRT"
case class Tan(child: Expression) extends UnaryMathExpression(math.tan,
"TAN")
@ExpressionDescription(
- usage = "_FUNC_(expr) - Returns the cotangent of `expr`.",
+ usage = "_FUNC_(expr) - Returns the cotangent of `expr` ," +
--- End diff --
Ditto for formatting
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