fix typos in changes file ( thanks to @mvidner)

package/yast2-core.changes

@@ -9,12 +9,12 @@ Fri Jun  7 09:05:24 UTC 2013 - jreidinger@suse.com
 - fixed some memory leaks
 - various fixes to the XML serialization of YCP
 - Fixed function type matching to be contravariant for arguments 
-  (BNC#825263) (return typa has always been covariant, correctly)
-  Interface expected to handle "any" argument will no longer accepts
+  (BNC#825263) (return type has always been covariant, correctly)
+  Interface expected to handle "any" argument will no longer accept
   implementations handling only a specific subtype. Conversely,
   interfaces expected to handle a "string" will also accept 
   implementation handling "any".
-  Affects the "is" builtin; break *-bindings relying on the bug.
+  Affects the "is" builtin; breaks *-bindings relying on the bug.
 - 2.24.0
 
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