Fix minor typos in apidoc

Change-Id: I5ce9599a60ea336b469807df075e491f0e6df680
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

src/corelib/tools/qchar.cpp

@@ -101,7 +101,7 @@ QT_BEGIN_NAMESPACE
     In Qt, Unicode characters are 16-bit entities without any markup
     or structure. This class represents such an entity. It is
     lightweight, so it can be used everywhere. Most compilers treat
-    it like a \c{unsigned short}.
+    it like an \c{unsigned short}.
 
     QChar provides a full complement of testing/classification
     functions, converting to and from other formats, converting from

src/widgets/kernel/qaction.cpp

@@ -625,7 +625,7 @@ QActionGroup *QAction::actionGroup() const
     it is displayed to the left of the menu text. There is no default
     icon.
 
-    If a null icon (QIcon::isNull() is passed into this function,
+    If a null icon (QIcon::isNull()) is passed into this function,
     the icon of the action is cleared.
 */
 void QAction::setIcon(const QIcon &icon)