Update docstrings

m-kuhn · m-kuhn · commit a3f14df36780 · 2017-06-26T08:21:11.000+02:00
diff --git a/python/core/geometry/qgslinestring.sip b/python/core/geometry/qgslinestring.sip
@@ -75,7 +75,7 @@ class QgsLineString: QgsCurve
 %Docstring
  Returns the z-coordinate of the specified node in the line string.
  \param index index of node, where the first node in the line is 0
- :return: z-coordinate of node, or 0.0 if index is out of bounds or the line
+ :return: z-coordinate of node, or ``nan`` if index is out of bounds or the line
  does not have a z dimension
 .. seealso:: setZAt()
  :rtype: float
@@ -85,7 +85,7 @@ class QgsLineString: QgsCurve
 %Docstring
  Returns the m value of the specified node in the line string.
  \param index index of node, where the first node in the line is 0
- :return: m value of node, or 0.0 if index is out of bounds or the line
+ :return: m value of node, or ``nan`` if index is out of bounds or the line
  does not have m values
 .. seealso:: setMAt()
  :rtype: float
diff --git a/src/core/geometry/qgslinestring.h b/src/core/geometry/qgslinestring.h
@@ -83,15 +83,15 @@ class CORE_EXPORT QgsLineString: public QgsCurve
 
     /** Returns the z-coordinate of the specified node in the line string.
      * \param index index of node, where the first node in the line is 0
-     * \returns z-coordinate of node, or 0.0 if index is out of bounds or the line
+     * \returns z-coordinate of node, or ``nan`` if index is out of bounds or the line
      * does not have a z dimension
      * \see setZAt()
      */
     double zAt( int index ) const;
 
     /** Returns the m value of the specified node in the line string.
      * \param index index of node, where the first node in the line is 0
-     * \returns m value of node, or 0.0 if index is out of bounds or the line
+     * \returns m value of node, or ``nan`` if index is out of bounds or the line
      * does not have m values
      * \see setMAt()
      */
