Fix typo, rename Observable2 to Other

Author: M0rtyMerr

Source/RxSwift/cascade.swift

@@ -20,7 +20,7 @@ extension Observable where Element: ObservableType {
 	- parameter observables: a sequence of observables which will all be immediately subscribed to
 	- returns: An observable sequence that contains elements from the latest observable sequence that emitted elements
 	*/
-    public static func cascade<Sequebce: Swift.Sequence>(_ observables: Sequebce) -> Observable<Element.Element> where Sequebce.Element == Element {
+    public static func cascade<Sequence: Swift.Sequence>(_ observables: Sequence) -> Observable<Element.Element> where Sequence.Element == Element {
         let flow = Array(observables)
         if flow.isEmpty {
             return Observable<Element.Element>.empty()

Source/RxSwift/zipWith.swift

@@ -21,7 +21,7 @@ extension ObservableConvertibleType {
 
      - Returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
      */
-    public func zip<Observable2: ObservableConvertibleType, ResultType>(with second: Observable2, resultSelector: @escaping (Element, Observable2.Element) throws -> ResultType) -> Observable<ResultType> {
+    public func zip<Other: ObservableConvertibleType, ResultType>(with second: Other, resultSelector: @escaping (Element, Other.Element) throws -> ResultType) -> Observable<ResultType> {
         return Observable.zip(asObservable(), second.asObservable(), resultSelector: resultSelector)
     }
 }