Merge pull request swiftlang#32556 from amartini51/release/5.3

[5.3] Minor doc fixes

Author: amartini51

stdlib/public/core/CharacterProperties.swift

@@ -32,7 +32,7 @@ extension Character {
   ///
   ///     let chars: [Character] = ["a", " ", "™"]
   ///     for ch in chars {
-  ///         print(ch, "-->", ch.properties.numericValue)
+  ///         print(ch, "-->", ch.asciiValue)
   ///     }
   ///     // a --> 97
   ///     //   --> 32
@@ -125,7 +125,7 @@ extension Character {
   ///
   ///     let chars: [Character] = ["4", "④", "万", "a"]
   ///     for ch in chars {
-  ///         print(ch, "-->", ch.properties.numericValue)
+  ///         print(ch, "-->", ch.wholeNumberValue)
   ///     }
   ///     // 4 --> 4
   ///     // ④ --> 4

stdlib/public/core/Collection.swift

@@ -491,7 +491,7 @@ public protocol Collection: Sequence {
   ///
   ///     let horseName = "Silver"
   ///     if horseName.isEmpty {
-  ///         print("I've been through the desert on a horse with no name.")
+  ///         print("My horse has no name.")
   ///     } else {
   ///         print("Hi ho, \(horseName)!")
   ///     }
@@ -1070,7 +1070,7 @@ extension Collection {
   ///
   ///     let horseName = "Silver"
   ///     if horseName.isEmpty {
-  ///         print("I've been through the desert on a horse with no name.")
+  ///         print("My horse has no name.")
   ///     } else {
   ///         print("Hi ho, \(horseName)!")
   ///     }

stdlib/public/core/Dictionary.swift

@@ -862,7 +862,7 @@ extension Dictionary {
   ///     let message = "Hello, Elle!"
   ///     var letterCounts: [Character: Int] = [:]
   ///     for letter in message {
-  ///         letterCounts[letter, defaultValue: 0] += 1
+  ///         letterCounts[letter, default: 0] += 1
   ///     }
   ///     // letterCounts == ["H": 1, "e": 2, "l": 4, "o": 1, ...]
   ///

stdlib/public/core/FloatingPoint.swift

@@ -144,14 +144,14 @@
 /// every value of the `tempsFahrenheit` array, any NaN values cause the
 /// result to also be NaN, as seen in this example:
 ///
-///     let badAverage = tempsFahrenheit.reduce(0.0, combine: +) / Double(tempsFahrenheit.count)
+///     let badAverage = tempsFahrenheit.reduce(0.0, +) / Double(tempsFahrenheit.count)
 ///     // badAverage.isNaN == true
 ///
 /// Instead, when you need an operation to have a specific numeric result,
 /// filter out any NaN values using the `isNaN` property.
 ///
 ///     let validTemps = tempsFahrenheit.filter { !$0.isNaN }
-///     let average = validTemps.reduce(0.0, combine: +) / Double(validTemps.count)
+///     let average = validTemps.reduce(0.0, +) / Double(validTemps.count)
 ///
 /// Finally, report the average temperature and observation counts:
 ///