Fix QLineF Detailed Description

Currently angle() is used in place of angleTo() to describe the
difference with intersect. This patch fixes that.

Task-number: QTBUG-44309
Change-Id: Idfc521932247f76fe15fd980ff8e87e52feec1f1
(cherry picked from qtbase/7dd0ea7b644fe63ef57a9e7b30a9fd5312159e40)
Reviewed-by: Sze Howe Koh <[email protected]>

Author: Samuel Gaist

src/corelib/tools/qline.cpp

@@ -344,7 +344,7 @@ inline static qreal q_rad2deg(qreal x)
     or a null line.
 
     The intersect() function determines the IntersectType for this
-    line and a given line, while the angle() function returns the
+    line and a given line, while the angleTo() function returns the
     angle between the lines. In addition, the unitVector() function
     returns a line that has the same starting point as this line, but
     with a length of only 1, while the normalVector() function returns