[gardening] Fix inconsistent formatting.

Author: practicalswift

stdlib/public/core/HashedCollections.swift.gyb

@@ -1516,7 +1516,7 @@ public func _setBridgeFromObjectiveCConditional<
 ///
 ///     var interestingNumbers = ["primes": [2, 3, 5, 7, 11, 13, 15],
 ///                               "triangular": [1, 3, 6, 10, 15, 21, 28],
-///                               "hexagonal": [1, 6, 15, 28, 45, 66, 91] ]
+///                               "hexagonal": [1, 6, 15, 28, 45, 66, 91]]
 ///     for key in interestingNumbers.keys {
 ///         interestingNumbers[key]?.sort(isOrderedBefore: >)
 ///     }