--- a/CHANGELOG	Wed Dec 26 14:52:07 2018 +0800
+++ b/CHANGELOG	Fri Jan 11 09:26:41 2019 -0800
@@ -9,6 +9,7 @@
   * split: no longer accept revision with --rev (BC)
   * split: accept file patterns
   * split: support for non interactive splits
+  * fold: concatenate commit message in revision order
   * push: have `--publish` overrule the `auto-publish` config
   * next: evolve aspiring children by default (use --no-evolve to skip)
   * next: pick lower part of a split as destination

--- a/hgext3rd/evolve/cmdrewrite.py	Wed Dec 26 14:52:07 2018 +0800
+++ b/hgext3rd/evolve/cmdrewrite.py	Fri Jan 11 09:26:41 2019 -0800
@@ -740,6 +740,10 @@
         ui.write_err(_('single revision specified, nothing to fold\n'))
         return 1
 
+    # Sort so combined commit message of `hg fold --exact -r . -r .^` is
+    # in topological order.
+    revs.sort()
+
     wlock = lock = None
     try:
         wlock = repo.wlock()

--- a/tests/test-evolve-phase-divergence.t	Wed Dec 26 14:52:07 2018 +0800
+++ b/tests/test-evolve-phase-divergence.t	Fri Jan 11 09:26:41 2019 -0800
@@ -893,7 +893,7 @@
   1 new phase-divergent changesets
 
   $ hg glog -r f3794e5a91dc::
-  @  24:e450d05b7d27 added g
+  @  24:390acb97e50a added f
   |   () draft
   | o  23:428f7900a969 added g
   | |   () public
@@ -906,14 +906,14 @@
   ~
 
   $ hg evolve --list
-  e450d05b7d27: added g
+  390acb97e50a: added f
     phase-divergent: 21ae52e414e6 (immutable precursor)
     phase-divergent: 428f7900a969 (immutable precursor)
   
 Resolving phase divergence using `hg evolve`
 
   $ hg evolve --phase-divergent --all
-  recreate:[24] added g
+  recreate:[24] added f
   atop:[23] added g
   rebasing to destination parent: 21ae52e414e6
   computing new diff

--- a/tests/test-fold.t	Wed Dec 26 14:52:07 2018 +0800
+++ b/tests/test-fold.t	Fri Jan 11 09:26:41 2019 -0800
@@ -244,5 +244,29 @@
   |
   o  0 - 1ea73414a91b r0 [debugbuilddag] (public)
   
+Test order of proposed commit message
+
+  $ hg fold --exact --hidden -r 4 -r 5 -r 6
+  2 new content-divergent changesets
+  3 changesets folded
+  $ hg log -r tip -T '{desc}'
+  r4
+  
+  
+  r5
+  
+  
+  r6 (no-eol)
+  $ hg fold --exact --hidden -r 6 -r 4 -r 5
+  3 changesets folded
+  $ hg log -r tip -T '{desc}'
+  r4
+  
+  
+  r5
+  
+  
+  r6 (no-eol)
+
   $ cd ..