Fix cs

jderusse · jderusse · commit d53affdf3ec5 · 2020-04-19T18:07:52.000+02:00
diff --git a/lock.rst b/lock.rst
@@ -2,7 +2,7 @@
     single: Lock
 
 Dealing with concurrency with Locks
-==================================
+===================================
 
 When a program runs concurrently, some part of code which modify shared
 resources should not be accessed by multiple processes at the same time.
