Fix dox

Author: nyalldawson

python/core/auto_generated/symbology/qgssymbollayer.sip.in

@@ -860,7 +860,7 @@ Renders the line symbol layer along the line joining ``points``, using the given
 Renders the line symbol layer along the outline of polygon, using the given render ``context``.
 
 The exterior ring of the polygon is specified in ``points``. Optionally, interior
-rings are set via the ``rings`` arugment.
+rings are set via the ``rings`` argument.
 
 .. seealso:: :py:func:`renderPolyline`
 %End

python/gui/auto_generated/symbology/qgssymbollayerwidget.sip.in

@@ -379,6 +379,11 @@ Creates a new QgsMarkerLineSymbolLayerWidget.
 
 class QgsHashedLineSymbolLayerWidget : QgsSymbolLayerWidget
 {
+%Docstring
+Widget for controlling the properties of a :py:class:`QgsHashedLineSymbolLayer`.
+
+.. versionadded:: 3.8
+%End
 
 %TypeHeaderCode
 #include "qgssymbollayerwidget.h"

src/core/symbology/qgssymbollayer.h

@@ -803,7 +803,7 @@ class CORE_EXPORT QgsLineSymbolLayer : public QgsSymbolLayer
      * Renders the line symbol layer along the outline of polygon, using the given render \a context.
      *
      * The exterior ring of the polygon is specified in \a points. Optionally, interior
-     * rings are set via the \a rings arugment.
+     * rings are set via the \a rings argument.
      *
      * \see renderPolyline()
      */

src/gui/symbology/qgssymbollayerwidget.h

@@ -509,6 +509,8 @@ class QgsHashedLineSymbolLayer;
 /**
  * \ingroup gui
  * \class QgsHashedLineSymbolLayerWidget
+ * Widget for controlling the properties of a QgsHashedLineSymbolLayer.
+ * \since QGIS 3.8
  */
 class GUI_EXPORT QgsHashedLineSymbolLayerWidget : public QgsSymbolLayerWidget, private Ui::WidgetHashedLine
 {