Doc: Fix documentation warnings

src/qml/jsapi/qjsengine.cpp:524: warning:
  Undocumented parameter 'metaObject' in QJSEngine::newQMetaObject()
src/qml/qml/qqmlengine.cpp:1023: warning:
  Undocumented parameter 'retCode' in QQmlEngine::exit()
src/qml/doc/src/qmlfunctions.qdoc:182: warning:
  Undocumented parameter 'reason' in qmlRegisterUncreatableMetaObject()
src/qml/qml/qqmllist.cpp:393: warning:
  Undocumented parameter 'at' in QQmlListProperty::QQmlListProperty()
src/qml/qml/qqmllist.cpp:393: warning:
  Undocumented parameter 'count' in QQmlListProperty::QQmlListProperty()
src/qml/qml/qqmllist.cpp:402: warning:
  Undocumented parameter 'at' in QQmlListProperty::QQmlListProperty()
src/qml/qml/qqmllist.cpp:402: warning:
  Undocumented parameter 'count' in QQmlListProperty::QQmlListProperty()
src/qml/qml/qqmllist.cpp:402: warning:
  Undocumented parameter 'append' in QQmlListProperty::QQmlListProperty()
src/qml/qml/qqmllist.cpp:402: warning:
  Undocumented parameter 'clear' in QQmlListProperty::QQmlListProperty()
src/quick/items/qquickwindow.cpp:4461: warning:
  No such parameter 'backend' in QQuickWindow::setSceneGraphBackend()

Also do some minor language editing.

Change-Id: I2e806d1a77e3c4264d709c27d2bfc4542a782716
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

3 files changed, 16 insertions, 8 deletions

diff --git a/src/qml/qml/qqmlengine.cpp b/src/qml/qml/qqmlengine.cpp
index 2a439bde98..c800641f1c 100644
--- a/src/qml/qml/qqmlengine.cpp
+++ b/src/qml/qml/qqmlengine.cpp
@@ -1022,7 +1022,7 @@ QQmlEngine::~QQmlEngine()
 
 /*! \fn void QQmlEngine::exit(int retCode)
     This signal is emitted when the QML loaded by the engine would like to exit
-    from the event loop with the specified return code.
+    from the event loop with the specified return code \a retCode.
 
     \since 5.8
     \sa quit()
diff --git a/src/qml/qml/qqmllist.cpp b/src/qml/qml/qqmllist.cpp
index edd93ef03d..2c71293363 100644
--- a/src/qml/qml/qqmllist.cpp
+++ b/src/qml/qml/qqmllist.cpp
@@ -394,8 +394,9 @@ can be very useful while prototyping.
 \fn QQmlListProperty::QQmlListProperty(QObject *object, void *data,
                                     CountFunction count, AtFunction at)
 
-Construct a readonly QQmlListProperty from a set of operation functions.  An opaque \a data handle
-may be passed which can be accessed from within the operation functions.  The list property
+Construct a readonly QQmlListProperty from a set of operation functions
+\a count and \a at. An opaque \a data handle may be passed which can be
+accessed from within the operation functions.  The list property
 remains valid while \a object exists.
 */
 
@@ -404,8 +405,9 @@ remains valid while \a object exists.
                                      CountFunction count, AtFunction at,
                                      ClearFunction clear)
 
-Construct a QQmlListProperty from a set of operation functions.  An opaque \a data handle
-may be passed which can be accessed from within the operation functions.  The list property
+Construct a QQmlListProperty from a set of operation functions \a append,
+\a count, \a at, and \a clear.  An opaque \a data handle may be passed which
+can be accessed from within the operation functions.  The list property
 remains valid while \a object exists.
 
 Null pointers can be passed for any function. If any null pointers are passed in, the list
diff --git a/src/qml/qml/qqmlproperty.cpp b/src/qml/qml/qqmlproperty.cpp
index c62fef7c3d..0b8eb677cb 100644
--- a/src/qml/qml/qqmlproperty.cpp
+++ b/src/qml/qml/qqmlproperty.cpp
@@ -1400,9 +1400,9 @@ QQmlMetaObject QQmlPropertyPrivate::rawMetaObjectForType(QQmlEnginePrivate *engi
 }
 
 /*!
-    Sets the property value to \a value and returns true.
-    Returns false if the property can't be set because the
-    \a value is the wrong type, for example.
+    Sets the property value to \a value. Returns \c true on success, or
+    \c false if the property can't be set because the \a value is the
+    wrong type, for example.
  */
 bool QQmlProperty::write(const QVariant &value) const
 {
@@ -1417,6 +1417,8 @@ bool QQmlProperty::write(const QVariant &value) const
     QQmlProperty p(object, name);
     p.write(value);
   \endcode
+
+  Returns \c true on success, \c false otherwise.
 */
 bool QQmlProperty::write(QObject *object, const QString &name, const QVariant &value)
 {
@@ -1433,6 +1435,8 @@ bool QQmlProperty::write(QObject *object, const QString &name, const QVariant &v
     QQmlProperty p(object, name, ctxt);
     p.write(value);
   \endcode
+
+  Returns \c true on success, \c false otherwise.
 */
 bool QQmlProperty::write(QObject *object,
                                  const QString &name,
@@ -1453,6 +1457,8 @@ bool QQmlProperty::write(QObject *object,
     QQmlProperty p(object, name, engine);
     p.write(value);
   \endcode
+
+  Returns \c true on success, \c false otherwise.
 */
 bool QQmlProperty::write(QObject *object, const QString &name, const QVariant &value,
                                  QQmlEngine *engine)