Minor typo fixes in comment.

qwt/src/qwt_plot_layout.cpp

@@ -1177,7 +1177,7 @@ void QwtPlotLayout::setAlignCanvasToScales( bool on )
 
   The axisId parameter is somehow confusing as it identifies a border
   of the plot and not the axes, that are aligned. F.e when QwtAxis::yLeft
-  is set, the left end of the the x-axes ( QwtAxis::xTop, QwtAxis::xBottom )
+  is set, the left end of the x-axes ( QwtAxis::xTop, QwtAxis::xBottom )
   is aligned.
 
   \param axisId Axis index

qwt/src/qwt_plot_textlabel.cpp

@@ -243,7 +243,7 @@ void QwtPlotTextLabel::draw( QPainter *painter,
    \param rect Canvas rectangle with margins subtracted
    \param textSize Size required to draw the text
 
-   \return A rectangle aligned according the the alignment flags of
+   \return A rectangle aligned according the alignment flags of
            the text.
 
    \sa setMargin(), QwtText::renderFlags(), QwtText::textSize()

qwt/src/qwt_plot_zoomer.cpp

@@ -452,7 +452,7 @@ void QwtPlotZoomer::moveBy( double dx, double dy )
 }
 
 /*!
-  Move the the current zoom rectangle.
+  Move the current zoom rectangle.
 
   \param pos New position
 

qwt/src/qwt_scale_widget.cpp

@@ -451,7 +451,7 @@ void QwtScaleWidget::draw( QPainter *painter ) const
 }
 
 /*!
-  Calculate the the rectangle for the color bar
+  Calculate the rectangle for the color bar
 
   \param rect Bounding rectangle for all components of the scale
   \return Rectangle for the color bar

qwt/src/qwt_series_data.h

@@ -267,7 +267,7 @@ QWT_EXPORT QRectF qwtBoundingRect(
     Binary search for a sorted series of samples
 
     qwtUpperSampleIndex returns the index of sample that is the upper bound
-    of value. Is the the value smaller than the smallest value the return
+    of value. Is the value smaller than the smallest value the return
     value will be 0. Is the value greater or equal than the largest
     value the return value will be -1.
 

qwt/src/qwt_series_store.h

@@ -75,10 +75,10 @@ public:
     */
     void setData( QwtSeriesData<T> *series );
 
-    //! \return the the series data
+    //! \return the series data
     QwtSeriesData<T> *data();
 
-    //! \return the the series data
+    //! \return the series data
     const QwtSeriesData<T> *data() const;
 
     /*!

qwt/src/qwt_slider.cpp

@@ -125,7 +125,7 @@ QwtSlider::QwtSlider( QWidget *parent ):
   Construct a slider in QwtSlider::Trough style
 
   When orientation is Qt::Vertical the scale will be aligned to
-  the left - otherwise at the the top of the slider.
+  the left - otherwise at the top of the slider.
 
   The scale is initialized to [0.0, 100.0] and the value set to 0.0.
 

qwt/src/qwt_symbol.h

@@ -132,7 +132,7 @@ public:
 
       F.e. the raster paint engine is a pure software renderer
       where in cache mode a draw operation usually ends in 
-      raster operation with the the backing store, that are usually
+      raster operation with the backing store, that are usually
       faster, than the algorithms for rendering polygons.
       But the opposite can be expected for graphic pipelines
       that can make use of hardware acceleration.