Merge pull request #63 from Carthage/fix-task-description

Quote whitespace-containing arguments in Task.description

ReactiveTask/Task.swift

@@ -46,9 +46,19 @@ public struct Task {
 	}
 }
 
+private extension String {
+	var escaped: String {
+		if rangeOfCharacterFromSet(.whitespaceCharacterSet()) != nil {
+			return "\"\(self)\""
+		} else {
+			return self
+		}
+	}
+}
+
 extension Task: CustomStringConvertible {
 	public var description: String {
-		return "\(launchPath) \(arguments.joinWithSeparator(" "))"
+		return "\(launchPath) \(arguments.map { $0.escaped }.joinWithSeparator(" "))"
 	}
 }