Fix a couple of small doc things in relation to QScopeGuard

Change-Id: I6e61a18697b95d9e3f534d1d71ebf32fdff4a04f
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

src/corelib/doc/snippets/code/src_corelib_tools_qscopeguard.cpp

@@ -57,7 +57,7 @@ void myComplexCodeWithMultipleReturnPoints(int v)
     if (v == -1)
         return;
 
-    int v2 = code_that_might_through_exceptions();
+    int v2 = code_that_might_throw_exceptions();
 
     if (v2 == -1)
         return;

src/corelib/tools/qscopeguard.qdoc

@@ -33,7 +33,7 @@ QT_BEGIN_NAMESPACE
     \class QScopeGuard
     \since 5.12
     \inmodule QtCore
-    \brief Provides a scope guard for calling a function at the of
+    \brief Provides a scope guard for calling a function at the end of
            a scope.
 */