More typos.

Author: Neil

1d. Optionals.playground/section-1.swift

@@ -80,14 +80,14 @@ else
 //
 // We can conditionally store the unwrapped value to a stored value if the optional holds a value.
 //
-// In the foloowing block, we'll optionally bind the Int value to a constant named 'intValue'
+// In the following block, we'll optionally bind the Int value to a constant named 'intValue'
 if let intValue = optionalConvertedNumber
 {
 	// No need to use the "!" suffix as intValue is not optional
 	intValue
 
 	// In fact, since 'intValue' is an Int (not an Int?) we can't use the force-unwrap. This line
-	// of code wont' compile:
+	// of code won't compile:
 	// intValue!
 }
 else

1d. Optionals.playground/timeline.xctimeline

@@ -3,7 +3,7 @@
    version = "3.0">
    <TimelineItems>
       <LoggerValueHistoryTimelineItem
-         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=6821&amp;EndingColumnNumber=5&amp;EndingLineNumber=2&amp;StartingColumnNumber=4&amp;StartingLineNumber=2&amp;Timestamp=424672367.449789">
+         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=6821&amp;EndingColumnNumber=5&amp;EndingLineNumber=2&amp;StartingColumnNumber=4&amp;StartingLineNumber=2&amp;Timestamp=428937322.498252">
       </LoggerValueHistoryTimelineItem>
    </TimelineItems>
 </Timeline>