Doc: Remove duplicate words

Change-Id: If596f8677bbebba160e740dfcc24bba064dcb85f
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

examples/designer/doc/src/taskmenuextension.qdoc

@@ -10,7 +10,7 @@
     menu entries that are associated with the plugin.
 
     The Task Menu Extension example shows how to create a custom
-    widget plugin for \l {Qt Designer Manual}{\QD}, and how to to use
+    widget plugin for \l {Qt Designer Manual}{\QD}, and how to use
     the QDesignerTaskMenuExtension class to provide custom task menu
     entries associated with the plugin.
 

src/designer/src/lib/extension/default_extensionfactory.cpp

@@ -53,7 +53,7 @@ QT_BEGIN_NAMESPACE
     For a complete example using the QExtensionFactory class, see the
     \l {taskmenuextension}{Task Menu Extension example}. The
     example shows how to create a custom widget plugin for Qt
-    Designer, and how to to use the QDesignerTaskMenuExtension class
+    Designer, and how to use the QDesignerTaskMenuExtension class
     to add custom items to Qt Designer's task menu.
 
     \sa QExtensionManager, QAbstractExtensionFactory

src/designer/src/lib/extension/qextensionmanager.cpp

@@ -50,7 +50,7 @@ QT_BEGIN_NAMESPACE
     For a complete example using the QExtensionManager class, see the
     \l {taskmenuextension}{Task Menu Extension example}. The
     example shows how to create a custom widget plugin for Qt
-    Designer, and how to to use the QDesignerTaskMenuExtension class
+    Designer, and how to use the QDesignerTaskMenuExtension class
     to add custom items to \QD's task menu.
 
     \sa QExtensionFactory, QAbstractExtensionManager

src/designer/src/lib/sdk/membersheet.qdoc

@@ -88,7 +88,7 @@
     For a complete example using an extension class, see \l
     {taskmenuextension}{Task Menu Extension example}. The
     example shows how to create a custom widget plugin for Qt
-    Designer, and how to to use the QDesignerTaskMenuExtension class
+    Designer, and how to use the QDesignerTaskMenuExtension class
     to add custom items to \QD's task menu.
 
     \sa QExtensionFactory, QExtensionManager, {Creating Custom Widget

src/designer/src/lib/sdk/propertysheet.qdoc

@@ -105,7 +105,7 @@
 
     Or you can use an existing factory, expanding the
     QExtensionFactory::createExtension() function to make the factory
-    able to create a property sheet extension extension as well. For
+    able to create a property sheet extension as well. For
     example:
 
     \snippet plugins/doc_src_qtdesigner.cpp 18
@@ -113,7 +113,7 @@
     For a complete example using an extension class, see the \l
     {taskmenuextension}{Task Menu Extension example}. The
     example shows how to create a custom widget plugin for Qt
-    Designer, and how to to use the QDesignerTaskMenuExtension class
+    Designer, and how to use the QDesignerTaskMenuExtension class
     to add custom items to \QD's task menu.
 
     \sa QExtensionFactory, QExtensionManager, {Creating Custom Widget

src/designer/src/lib/sdk/taskmenu.qdoc

@@ -81,7 +81,7 @@
     For a complete example using the QDesignerTaskMenuExtension class,
     see the \l {taskmenuextension}{Task Menu Extension
     example}. The example shows how to create a custom widget plugin
-    for \QD, and how to to use the QDesignerTaskMenuExtension
+    for \QD, and how to use the QDesignerTaskMenuExtension
     class to add custom items to \QD's task menu.
 
     \sa QExtensionFactory, QExtensionManager, {Creating Custom Widget

src/qdoc/aggregate.cpp

@@ -407,7 +407,7 @@ void Aggregate::addFunction(FunctionNode *fn)
   Aggregate's function map.
 
   The function is also removed from the overload list
-  that's relative to the the original parent \a firstParent.
+  that's relative to the original parent \a firstParent.
 
   \note This is a private function.
  */

src/qdoc/doc/qdoc-manual-markupcmds.qdoc

@@ -997,7 +997,7 @@
     \section2 Highlighting and autolinking
 
     The \\code commands attempts to parse its contents as code of a
-    specific language, as defined in the the \l {language-variable}{language}
+    specific language, as defined in the \l {language-variable}{language}
     configuration variable. This provides highlighting and automatic
     linking to types detected in the code.
 

src/qdoc/generator.cpp

@@ -109,7 +109,7 @@ void Generator::appendFullName(Text &text, const Node *apparentNode, const QStri
 
 /*!
   Append the signature for the function named in \a node to
-  \a text, so that is is a link to the documentation for that
+  \a text, so that is a link to the documentation for that
   function.
  */
 void Generator::appendSignature(Text &text, const Node *node)

src/qdoc/tree.cpp

@@ -1097,7 +1097,7 @@ void Tree::insertQmlType(const QString &key, QmlTypeNode *n)
 /*!
   Finds the function node with the specifried name \a path that
   also has the specified \a parameters and returns a pointer to
-  the the first matching function node if one is found.
+  the first matching function node if one is found.
 
   This function begins searching the tree at \a relative for
   the \l {FunctionNode} {function node} identified by \a path

src/shared/qtpropertybrowser/qtpropertybrowser.cpp

@@ -1561,7 +1561,7 @@ void QtAbstractPropertyBrowserPrivate::slotPropertyDataChanged(QtProperty *prope
     \a item of the property as parameters. The passed \a item is
     deleted just after this call is finished.
 
-    If the the parent of \a item is 0, the removed \a item was a
+    If the parent of \a item is 0, the removed \a item was a
     top level property in this editor.
 
     This function must be reimplemented in derived classes. Note that