bpo-39136: Fixed typos (GH-17720)

funtion -> function; configuraton -> configuration; defintitions -> definitions;
focusses -> focuses; necesarily -> necessarily; follwing -> following;
Excape -> Escape,
diff --git a/Doc/faq/programming.rst b/Doc/faq/programming.rst
index 9d45765..70b11d6 100644
--- a/Doc/faq/programming.rst
+++ b/Doc/faq/programming.rst
@@ -1019,7 +1019,7 @@
 remember before diving further:
 
 * Performance characteristics vary across Python implementations.  This FAQ
-  focusses on :term:`CPython`.
+  focuses on :term:`CPython`.
 * Behaviour can vary across operating systems, especially when talking about
   I/O or multi-threading.
 * You should always find the hot spots in your program *before* attempting to