Small documentation fixes

This includes 2 small typos I found when working on generator skipping,
and 1 typo found by @sfraczek in #3039.

Closes #3039

Author: horenmar

docs/event-listeners.md

@@ -10,7 +10,7 @@ in-memory logs if they are not needed (the test case passed).
 Unlike reporters, each registered event listener is always active. Event
 listeners are always notified before reporter(s).
 
-To write your own event listener, you should derive from `Catch::TestEventListenerBase`,
+To write your own event listener, you should derive from `Catch::EventListenerBase`,
 as it provides empty stubs for all reporter events, allowing you to
 only override events you care for. Afterwards you have to register it
 with Catch2 using `CATCH_REGISTER_LISTENER` macro, so that Catch2 knows

docs/generators.md

@@ -275,7 +275,7 @@ There are two ways to handle this, depending on whether you want this
 to be an error or not.
 
  * If empty generator **is** an error, throw an exception in constructor.
- * If empty generator **is not** an error, use the [`SKIP`](skipping-passing-failing.md#skipping-test-cases-at-runtime) in constructor.
+ * If empty generator **is not** an error, use the [`SKIP` macro](skipping-passing-failing.md#skipping-test-cases-at-runtime) in constructor.
 
 
 

docs/skipping-passing-failing.md

@@ -87,7 +87,7 @@ TEST_CASE("complex test case") {
 ```
 
 This test case will report 5 passing assertions; one for each of the three
-values in section `a1`, and then two in section `a2`, from values 2 and 4.
+values in section `a1`, and then two in section `a2`, from values 2 and 6.
 
 Note that as soon as one section is skipped, the entire test case will
 be reported as _skipped_ (unless there is a failing assertion, in which