Fix a minor mistake in the generator and docs

Author: akarnokd

docs/Operator-Matrix.md

@@ -238,5 +238,3 @@ Operator | `Flowable` | `Observable` | `Maybe` | `Single` | `Completable` |
 `zip`|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![absent](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_off.png)|
 `zipArray`|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![absent](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_off.png)|
 `zipWith`|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![absent](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_off.png)|
-esent](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![absent](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_off.png)|
-`zipWith`|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![present](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_on.png)|![absent](https://raw.github.com/wiki/ReactiveX/RxJava/images/checkmark_off.png)|

docs/_Sidebar.md.md

@@ -21,6 +21,7 @@
   * [Transformation](https://github.com/ReactiveX/RxJava/wiki/Transforming-Observables)
   * [Utility](https://github.com/ReactiveX/RxJava/wiki/Observable-Utility-Operators)
   * [Notable 3rd party Operators (Alphabetical List)](https://github.com/ReactiveX/RxJava/wiki/Alphabetical-List-of-3rd-party-Operators)
+  * [Operator matrix](https://github.com/ReactiveX/RxJava/wiki/Operator-Matrix)
 * [Plugins](https://github.com/ReactiveX/RxJava/wiki/Plugins)
 * [How to Contribute](https://github.com/ReactiveX/RxJava/wiki/How-to-Contribute)
 * [Writing operators](https://github.com/ReactiveX/RxJava/wiki/Writing-operators-for-2.0)

src/test/java/io/reactivex/rxjava3/internal/util/OperatorMatrixGenerator.java

@@ -61,7 +61,7 @@ public static void main(String[] args) throws IOException {
         List<String> sortedOperators = new ArrayList<>(operatorSet);
         sortedOperators.sort(Comparator.naturalOrder());
 
-        try (PrintWriter out = new PrintWriter(Files.newBufferedWriter(Paths.get("docs", "Operator-Matrix.md"), StandardOpenOption.CREATE))) {
+        try (PrintWriter out = new PrintWriter(Files.newBufferedWriter(Paths.get("docs", "Operator-Matrix.md"), StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING))) {
             out.print("Operator |");
             for (Class<?> clazz : CLASSES) {
                 out.print(" `");