fix docs

Change-Id: Id57b7932afb89fe9d3f4f6e6c3b558265475d77b
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
Reviewed-by: Casper van Donderen <casper.vandonderen@nokia.com>

src/corelib/itemmodels/qabstractitemmodel.cpp

@@ -1416,7 +1416,7 @@ QAbstractItemModel::~QAbstractItemModel()
 
     For example:
 
-    \snippet widgets/itemviews/simpledommodel/dommodel.cpp 2
+    \snippet itemviews/simpledommodel/dommodel.cpp 2
 
     \note When implementing a table based model, columnCount() should return 0
     when the parent is valid.

src/corelib/itemmodels/qsortfilterproxymodel.cpp

@@ -1604,7 +1604,7 @@ void QSortFilterProxyModelPrivate::_q_sourceColumnsMoved(
     QSortFilterProxyModel and reimplementing lessThan(), which is
     used to compare items. For example:
 
-    \snippet widgets/itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp 5
+    \snippet itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp 5
 
     (This code snippet comes from the
     \l{itemviews/customsortfiltermodel}{Custom Sort/Filter Model}
@@ -1647,7 +1647,7 @@ void QSortFilterProxyModelPrivate::_q_sourceColumnsMoved(
     the \l{QSortFilterProxyModel::filterKeyColumn}{filterKeyColumn} property
     and performs filtering on columns 0, 1, and 2:
 
-    \snippet widgets/itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp 3
+    \snippet itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp 3
 
     (This code snippet comes from the
     \l{itemviews/customsortfiltermodel}{Custom Sort/Filter Model}

src/corelib/tools/qregularexpression.cpp

@@ -1007,11 +1007,7 @@ void QRegularExpressionPrivate::getPatternInfo()
 }
 
 
-/*!
-    \class QPcreJitStackPointer
-    \inmodule QtCore
-    \internal
-
+/*
     Simple "smartpointer" wrapper around a pcre_jit_stack, to be used with
     QThreadStorage.
 */

src/corelib/tools/qsize.cpp

@@ -219,8 +219,11 @@ void QSize::transpose()
 */
 
 /*!
-  \overload
-  \since 5.0
+    \overload
+    \since 5.0
+
+    Return a size scaled to a rectangle with the given size \a s,
+    according to the specified \a mode.
 */
 QSize QSize::scaled(const QSize &s, Qt::AspectRatioMode mode) const
 {
@@ -648,8 +651,11 @@ void QSizeF::transpose()
 */
 
 /*!
-  \overload
-  \since 5.0
+    \overload
+    \since 5.0
+
+    Returns a size scaled to a rectangle with the given size \a s,
+    according to the specified \a mode.
 */
 QSizeF QSizeF::scaled(const QSizeF &s, Qt::AspectRatioMode mode) const
 {