histedit: clarify description of fold command

N and (N-1) didn't add any information to description of fold.
More useful is refering to the commit list as it is displayed in editor.

hgext/histedit.py

@@ -30,10 +30,12 b' file open in your editor::'
 
  # Edit history between c561b4e977df and 7c2fd3b9020c
  #
+ # Commits are listed from least to most recent
+ #
  # Commands:
  #  p, pick = use commit
  #  e, edit = use commit, but stop for amending
- #  f, fold = use commit, but fold into previous commit (combines N and N-1)
+ #  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
  #  d, drop = remove commit from history
  #  m, mess = edit message without changing commit content
  #
@@ -49,10 +51,12 b' would reorganize the file to look like t'
 
  # Edit history between c561b4e977df and 7c2fd3b9020c
  #
+ # Commits are listed from least to most recent
+ #
  # Commands:
  #  p, pick = use commit
  #  e, edit = use commit, but stop for amending
- #  f, fold = use commit, but fold into previous commit (combines N and N-1)
+ #  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
  #  d, drop = remove commit from history
  #  m, mess = edit message without changing commit content
  #
@@ -170,10 +174,12 b" testedwith = 'internal'"
 # i18n: command names and abbreviations must remain untranslated
 editcomment = _("""# Edit history between %s and %s
 #
+# Commits are listed from least to most recent
+#
 # Commands:
 #  p, pick = use commit
 #  e, edit = use commit, but stop for amending
-#  f, fold = use commit, but fold into previous commit (combines N and N-1)
+#  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
 #  d, drop = remove commit from history
 #  m, mess = edit message without changing commit content
 #

tests/test-histedit-arguments.t

@@ -51,10 +51,12 b' Run a dummy edit to make sure we get tip'
   
   # Edit history between eb57da33312f and 08d98a8350f3
   #
+  # Commits are listed from least to most recent
+  #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
-  #  f, fold = use commit, but fold into previous commit (combines N and N-1)
+  #  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #

tests/test-histedit-bookmark-motion.t

@@ -67,10 +67,12 b''
   
   # Edit history between d2ae7f538514 and 652413bf663e
   #
+  # Commits are listed from least to most recent
+  #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
-  #  f, fold = use commit, but fold into previous commit (combines N and N-1)
+  #  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #
@@ -125,10 +127,12 b''
   
   # Edit history between b346ab9a313d and cacdfd884a93
   #
+  # Commits are listed from least to most recent
+  #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
-  #  f, fold = use commit, but fold into previous commit (combines N and N-1)
+  #  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #

tests/test-histedit-commute.t

@@ -61,10 +61,12 b' show the edit commands offered'
   
   # Edit history between 177f92b77385 and 652413bf663e
   #
+  # Commits are listed from least to most recent
+  #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
-  #  f, fold = use commit, but fold into previous commit (combines N and N-1)
+  #  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #

tests/test-histedit-obsolete.t

@@ -51,10 +51,12 b' Enable obsolete'
   
   # Edit history between d2ae7f538514 and 652413bf663e
   #
+  # Commits are listed from least to most recent
+  #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
-  #  f, fold = use commit, but fold into previous commit (combines N and N-1)
+  #  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #

tests/test-histedit-outgoing.t

@@ -43,10 +43,12 b' show the edit commands offered by outgoi'
   
   # Edit history between 055a42cdd887 and 652413bf663e
   #
+  # Commits are listed from least to most recent
+  #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
-  #  f, fold = use commit, but fold into previous commit (combines N and N-1)
+  #  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #
@@ -72,10 +74,12 b' show the error from unrelated repos'
   
   # Edit history between 2a4042b45417 and 51281e65ba79
   #
+  # Commits are listed from least to most recent
+  #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
-  #  f, fold = use commit, but fold into previous commit (combines N and N-1)
+  #  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #
@@ -93,10 +97,12 b' test sensitivity to branch in URL:'
   
   # Edit history between f26599ee3441 and f26599ee3441
   #
+  # Commits are listed from least to most recent
+  #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
-  #  f, fold = use commit, but fold into previous commit (combines N and N-1)
+  #  f, fold = use commit, but fold into previous commit (combines this commit with the one above)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #