doc: typo in HACKING changes.

* HACKING: allow backward compatibilities again.

diff --git a/HACKING b/HACKING
index 248fd4b0312b198e6f3c3ae30a16a6868c9e133e..88d5274a9fcd56f9f47e7c46867d78c8896004f2 100644 (file)
--- a/HACKING
+++ b/HACKING
@@ -174,7 +174,7 @@
 * Major releases can introduce backward-incompatibilities (albeit such
   incompatibilities should be announced well in advance, and a smooth
   transition plan prepared for them), and try more risky and daring
-  refactorings and code cleanups.  Still, backward compatibilities are
+  refactorings and code cleanups.  Still, backward incompatibilities are
   extremely undesirable and should be avoided at all costs.
 
 * For more information, refer to the extensive discussion associated