Fix title formatting

Nodd · Nodd · commit ac07e544925d · 2024-11-03T12:44:28.000+01:00
diff --git a/Doc/library/math.rst b/Doc/library/math.rst
@@ -739,7 +739,7 @@ instead of circles.
 
 
 Special functions
--------------------------
+-----------------
 
 .. function:: erf(x)
 
