 		var positional: [String] = []
 
 		for arg in arguments {
+			// If this is a keyed argument...
 			if permitKeys && arg.hasPrefix("--") {
+				// Terminate any open keyed argument without a value.
 				if let key = currentKey {
 					untouchedKeyedArguments[key] = ""
 					currentKey = nil
 				}
 
-				// Check for -- by itself.
+				// Check for -- by itself, which should terminate the keyed
+				// argument list.
 				let keyStartIndex = arg.startIndex.successor().successor()
 				if keyStartIndex == arg.endIndex {
 					permitKeys = false

				continue
			}

			if let key = currentKey {
				untouchedKeyedArguments[key] = arg
				currentKey = nil

			}
		}

		// If the last argument seen was an option key, make sure to include it.
		if let key = currentKey {
			untouchedKeyedArguments[key] = ""
		}
