Issue 2112. mmap does not raises EnvironmentError no more, but
a subclass of it. Thanks John Lenton.
diff --git a/Misc/NEWS b/Misc/NEWS
index 377f1ed..a722195 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -1149,6 +1149,9 @@
 Extension Modules
 -----------------
 
+- #2112: mmap.error is now a subclass of EnvironmentError and not a
+  direct EnvironmentError
+
 - Bug #2111: mmap segfaults when trying to write a block opened with PROT_READ
 
 - #2063: correct order of utime and stime in os.times() result on Windows.