Fixed IOSim's CHANGELOGs.

Author: coot

io-sim/CHANGELOG.md

@@ -6,9 +6,6 @@
 
 * `MainReturn`, `MainException` and the pattern synonyms `TraceMainReturn`,
   `TraceMainException` changed their signature.  They will now also show the main thread id.
-
-#### Breaking changes
-
 * Renamed `ThreadId` to `IOSimThreadId` to avoid a clash with `ThreadId`
   associated type family of `MonadFork`.  It makes it much simpler to paste
   failing `ScheduleControl` in `ghci` or tests.
@@ -17,7 +14,6 @@
   a constructor for internal failures.  This improved error reporting when
   there's a bug in `IOSimPOR`.  Currently it's only used by some of the
   assertions in `IOSimPOR`.
-* added pretty printer for `SimResult`, and other pretty printer improvements.
 
 #### Non breaking changes
 
@@ -37,6 +33,7 @@
 * Reimplemented `labelTVarIO` and `traceTVarIO` in `ST` monad, which simplifies
   trace of these calls.
 * Fixed `traceTVar` for `TVar`'s created with `registerDelay`.
+* Added pretty printer for `SimResult`, and other pretty printer improvements.
 
 ## 1.2.0.0