Update exception-handling.md (#3927)

Author: SebastianAigner

docs/topics/exception-handling.md

@@ -306,15 +306,15 @@ fun main() = runBlocking {
         println("CoroutineExceptionHandler got $exception")
     }
     val job = GlobalScope.launch(handler) {
-        val inner = launch { // all this stack of coroutines will get cancelled
+        val innerJob = launch { // all this stack of coroutines will get cancelled
             launch {
                 launch {
                     throw IOException() // the original exception
                 }
             }
         }
         try {
-            inner.join()
+            innerJob.join()
         } catch (e: CancellationException) {
             println("Rethrowing CancellationException with original cause")
             throw e // cancellation exception is rethrown, yet the original IOException gets to the handler  

kotlinx-coroutines-core/jvm/test/guide/example-exceptions-06.kt

@@ -14,15 +14,15 @@ fun main() = runBlocking {
         println("CoroutineExceptionHandler got $exception")
     }
     val job = GlobalScope.launch(handler) {
-        val inner = launch { // all this stack of coroutines will get cancelled
+        val innerJob = launch { // all this stack of coroutines will get cancelled
             launch {
                 launch {
                     throw IOException() // the original exception
                 }
             }
         }
         try {
-            inner.join()
+            innerJob.join()
         } catch (e: CancellationException) {
             println("Rethrowing CancellationException with original cause")
             throw e // cancellation exception is rethrown, yet the original IOException gets to the handler