fix documentation in QgsRectangle

python/core/auto_generated/geometry/qgsrectangle.sip.in

@@ -229,17 +229,17 @@ Returns true when rectangle contains a point.
 
     void combineExtentWith( const QgsRectangle &rect );
 %Docstring
-Expand the rectangle so that covers both the original rectangle and the given rectangle.
+Expands the rectangle so that its covers both the original rectangle and the given rectangle.
 %End
 
     void combineExtentWith( double x, double y );
 %Docstring
-Expand the rectangle so that covers both the original rectangle and the given point.
+Expands the rectangle so that its covers both the original rectangle and the given point.
 %End
 
     void combineExtentWith( const QgsPointXY &point );
 %Docstring
-Expand the rectangle so that covers both the original rectangle and the given point.
+Expands the rectangle so that its covers both the original rectangle and the given point.
 
 .. versionadded:: 3.2
 %End

src/core/geometry/qgsrectangle.h

@@ -219,17 +219,17 @@ class CORE_EXPORT QgsRectangle
     bool contains( const QgsPointXY &p ) const;
 
     /**
-     * Expand the rectangle so that covers both the original rectangle and the given rectangle.
+     * Expands the rectangle so that its covers both the original rectangle and the given rectangle.
      */
     void combineExtentWith( const QgsRectangle &rect );
 
     /**
-     * Expand the rectangle so that covers both the original rectangle and the given point.
+     * Expands the rectangle so that its covers both the original rectangle and the given point.
      */
     void combineExtentWith( double x, double y );
 
     /**
-     * Expand the rectangle so that covers both the original rectangle and the given point.
+     * Expands the rectangle so that its covers both the original rectangle and the given point.
      * \since QGIS 3.2
      */
     void combineExtentWith( const QgsPointXY &point );