escape backslashes in doc strings
@@ -255,8 +255,8 @@ class _Polygon:
A|B ... A OR B (Union of A and B)
A&B ... A AND B (Intersection of A and B)
- A\B ... A - B
- B\A ... B - A
+ A\\B ... A - B
+ B\\A ... B - A
The entry records store the direction the algorithm should take when
it arrives at that entry point in an intersection. Depending on the
@@ -268,8 +268,8 @@ class _Polygon:
-----
A|B b b
A&B f f
- A\B b f
- B\A f b
+ A\\B b f
+ B\\A f b
f = True, b = False when stored in the entry record
"""
