Doc: Fix QDoc warnings for overloads

Change-Id: I9a77b6ea0026748c7f97f73b327118f7a9212d52
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

src/corelib/kernel/qiterable.cpp

@@ -240,6 +240,7 @@ QT_BEGIN_NAMESPACE
 
 /*!
     \fn template<class Container> qsizetype QIterator<Container>::operator-(const QIterator<Container> &j) const
+    \overload
 
     Returns the distance between the two iterators.
 
@@ -377,6 +378,8 @@ QT_BEGIN_NAMESPACE
 /*!
     \fn template <class Container> qsizetype QConstIterator<Container>::operator-(const QConstIterator<Container> &j) const
 
+    \overload
+
     Returns the distance between the two iterators.
 
     \sa operator+(), operator-=(), QIterable::canReverseIterate()

src/corelib/text/qbytearray.cpp

@@ -1282,6 +1282,7 @@ QByteArray::iterator QByteArray::erase(QByteArray::const_iterator first, QByteAr
 /*!
     \fn QByteArray::iterator QByteArray::erase(QByteArray::const_iterator it)
 
+    \overload
     \since 6.5
 
     Removes the character denoted by \c it from the byte array.

src/corelib/text/qstring.cpp

@@ -8084,6 +8084,7 @@ QStringList QString::split(const QRegularExpression &re, Qt::SplitBehavior behav
 }
 
 /*!
+    \overload
     \since 6.0
 
     Splits the string into substring views wherever the regular expression \a re
@@ -9179,6 +9180,7 @@ QString::iterator QString::erase(QString::const_iterator first, QString::const_i
 /*!
     \fn QString::iterator QString::erase(QString::const_iterator it)
 
+    \overload
     \since 6.5
 
     Removes the character denoted by \c it from the string.

src/corelib/time/qdatetime.cpp

@@ -5563,7 +5563,6 @@ QDateTime QDateTime::fromSecsSinceEpoch(qint64 secs, Qt::TimeSpec spec, int offs
 
 /*!
     \since 5.2
-    \overload
 
     Returns a datetime representing a moment the given number \a msecs of
     milliseconds after the start, in UTC, of the year 1970, described as
@@ -5595,7 +5594,6 @@ QDateTime QDateTime::fromMSecsSinceEpoch(qint64 msecs)
 
 /*!
     \since 5.8
-    \overload
 
     Returns a datetime representing a moment the given number \a secs of seconds
     after the start, in UTC, of the year 1970, described as specified by \a

src/gui/accessible/qaccessible.cpp

@@ -1655,8 +1655,8 @@ QAccessibleTextRemoveEvent::~QAccessibleTextRemoveEvent()
 /*!
      \fn QAccessibleTextInsertEvent::QAccessibleTextInsertEvent(QAccessibleInterface *iface, int position, const QString &text)
 
-     Constructs a new QAccessibleTextInsertEvent event for \a iface. The text has been inserted at
+     Constructs a new QAccessibleTextInsertEvent event for \a iface. The \a text has been inserted
-     \a position.
+     at \a position.
 */
 
 /*!

src/gui/painting/qpaintengine.cpp

@@ -481,6 +481,8 @@ void QPaintEngine::drawEllipse(const QRectF &rect)
 }
 
 /*!
+    \overload
+
     The default implementation of this function calls the floating
     point version of this function
 */

src/gui/rhi/qrhi.cpp

@@ -8808,6 +8808,8 @@ void QRhiResourceUpdateBatch::uploadStaticBuffer(QRhiBuffer *buf, quint32 offset
 }
 
 /*!
+    \overload
+
     Enqueues updating the entire QRhiBuffer \a buf created with the type
     QRhiBuffer::Immutable or QRhiBuffer::Static.
  */

src/sql/kernel/qsqldatabase.cpp

@@ -1127,6 +1127,7 @@ bool QSqlDatabase::isDriverAvailable(const QString& name)
 }
 
 /*! \fn QSqlDatabase QSqlDatabase::addDatabase(QSqlDriver* driver, const QString& connectionName)
+    \overload
 
     This overload is useful when you want to create a database
     connection with a \l{QSqlDriver} {driver} you instantiated