Fix various qdoc warnings

Parameter types and names, missing enum values, and \since 6.0.

Change-Id: I1b028fcf2ef0b57accb1ef7cebf17dab9f6d571e
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

src/corelib/kernel/qabstracteventdispatcher.cpp

@@ -249,7 +249,7 @@ int QAbstractEventDispatcher::registerTimer(qint64 interval, Qt::TimerType timer
 }
 
 /*!
-    \fn void QAbstractEventDispatcher::registerTimer(int timerId, int interval, Qt::TimerType timerType, QObject *object)
+    \fn void QAbstractEventDispatcher::registerTimer(int timerId, qint64 interval, Qt::TimerType timerType, QObject *object)
 
     Register a timer with the specified \a timerId, \a interval, and \a
     timerType for the given \a object.

src/corelib/kernel/qvariant.cpp

@@ -1984,7 +1984,7 @@ QVariantList QVariant::toList() const
     \since 6.0
 
     Returns \c true if the variant's type can be cast to the requested
-    type, \a targetTypeId. Such casting is done automatically when calling the
+    type, \a type. Such casting is done automatically when calling the
     toInt(), toBool(), ... methods.
 
     \sa QMetaType::canConvert()
@@ -2015,7 +2015,7 @@ QVariantList QVariant::toList() const
 */
 
 /*!
-    Casts the variant to the requested type, \a targetTypeId. If the cast cannot be
+    Casts the variant to the requested type, \a targetType. If the cast cannot be
     done, the variant is still changed to the requested type, but is left in a cleared
     null state similar to that constructed by QVariant(Type).
 
@@ -2024,7 +2024,7 @@ QVariantList QVariant::toList() const
 
     A QVariant containing a pointer to a type derived from QObject will also convert
     and return true for this function if a qobject_cast to the type described
-    by \a targetTypeId would succeed. Note that this only works for QObject subclasses
+    by \a targetType would succeed. Note that this only works for QObject subclasses
     which use the Q_OBJECT macro.
 
     \note converting QVariants that are null due to not being initialized or having
@@ -2141,7 +2141,7 @@ bool QVariant::view(int type, void *ptr)
     \li If one type is numeric and the other one a QString, Qt will try to
     convert the QString to a matching numeric type and if successful compare
     those.
-    \i If both variants contain pointers to QObject derived types, QVariant
+    \li If both variants contain pointers to QObject derived types, QVariant
     will check whether the types are related and point to the same object.
     \endlist
 */

src/corelib/serialization/qdatastream.cpp

@@ -554,6 +554,7 @@ void QDataStream::setByteOrder(ByteOrder bo)
     \value Qt_5_13 Version 19 (Qt 5.13)
     \value Qt_5_14 Same as Qt_5_13
     \value Qt_5_15 Same as Qt_5_13
+    \value Qt_6_0 Version 20 (Qt 6.0)
     \omitvalue Qt_DefaultCompiledVersion
 
     \sa setVersion(), version()
@@ -1021,9 +1022,11 @@ QDataStream &QDataStream::operator>>(char *&s)
 }
 
 /*!
- \overload
+    \overload
+    \since 6.0
 
- Reads a char from the stream into char \a chr.
+    Reads a 16bit wide char from the stream into \a c and
+    returns a reference to the stream.
 */
 QDataStream &QDataStream::operator>>(char16_t &c)
 {
@@ -1034,9 +1037,11 @@ QDataStream &QDataStream::operator>>(char16_t &c)
 }
 
 /*!
- \overload
+    \overload
+    \since 6.0
 
- Reads a char from the stream into char \a chr.
+    Reads a 32bit wide character from the stream into \a c and
+    returns a reference to the stream.
 */
 QDataStream &QDataStream::operator>>(char32_t &c)
 {

src/corelib/tools/qrect.cpp

@@ -1228,8 +1228,8 @@ bool QRect::intersects(const QRect &r) const noexcept
 /*!
     \fn static QRect QRect::span(const QPoint &p1, const QPoint &p2)
 
-    Returns a rectangle spanning the two points, including both and everything
-    in between.
+    Returns a rectangle spanning the two points \a p1 and \a p2, including both and
+    everything in between.
 
     \since 6.0
 */