Tweak NEWS.

NEWS

@@ -1,25 +1,23 @@
 * 4.0-beta7 (unreleased)
 - Bug fixes:
   + Allow estimating the alignment with a fixed topology.
+    - Don't crash trying NNI on fixed tree.
+    - Allow discovering a single partition by supplying alignment regs.
+    - realign_from_tips: don't modify the branch lengths if they are fixed.
   - Fix -l tsv with -m Model.hs
-- Haskell
-  + Report ancestral sequences as AlignedCharacterData.
-  + Allow simulating from ctmc_on_tree.
-  + Add class Alignment for common methods between AlignmentOnTree and AlignedCharacterData.
   - Fix default instances for type families.
-  - Refactor Tree class to add Graph and Forest
+- Haskell
+  + Ancestral sequences are now AlignedCharacterData.
+  + Sampled/observed sequences are Unaligned/AlignedCharacterData depending on if alignment is fixed.
+  + Can now simulate from ctmc_on_tree.
+  + Common methods between AlignmentOnTree and AlignedCharacterData now in class Alignment.
+  - Refactor generic methods in Tree class into classes Graph and Forest.
   - AlignmentOnTree: Only store sequence lengths for some nodes.
-  - Add some instances for Data.Map
   - Replace Sequence with (,)
-  - Add AlignedCharacterData, UnalignedCharacterData, CharacterData.
   - Stop using C++ alignment class when compressing sequence data.
-  - Make ctmc_on_tree operate on UnalignedCharacterData.
-  - Make ctmc_on_tree_fixed_A operate on AlignedCharacterData.
+  - Add some instances for Data.Map
 - Machine:
-  - Don't crash trying NNI on fixed tree.
   - Better error message if trying to read/modify a non-modifiable.
-  - Allow discovering a single partition by supplying alignment regs.
-  - realign_from_tips: don't modify the branch lengths if they are fixed.
   - Add associated type DistProperties, and return it from observed.
   - Add sampleWithProps -- hacky version.
   - Synchronize property indices between between variable and fixed-A.