quick doc change

IPython/core/magics/execution.py

@@ -188,7 +188,7 b' python-profiler package from non-free.""")'
 
         """Run a statement through the python code profiler.
 
-        Usage, in line mode:
+        Usage, in line mode:run
           %prun [options] statement
 
         Usage, in cell mode:
@@ -507,6 +507,8 b' python-profiler package from non-free.""")'
         *two* back slashes (e.g. ``\\\\*``) to suppress expansions.
         To completely disable these expansions, you can use -G flag.
 
+        On Windows systems, the use of double quotes `"` is required.
+
         Options:
 
         -n