File 0397-Remove-unnecessary-1-for-pretty-move-half.... of Package erlang

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File 0397-Remove-unnecessary-1-for-pretty-move-half.patch of Package erlang (Revision 877ed1ba0ccb1ec39b610352f04989aa)

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From 1315cfb7ade016be50f9525921b9c85559312160 Mon Sep 17 00:00:00 2001
From: zeek0x <0h23k1.n40k1@gmail.com>
Date: Mon, 21 Feb 2022 02:19:05 +0900
Subject: [PATCH 1/2] Remove unnecessary '+ 1' for pretty move half

When move half run,

- R2f
  - Before
    - Rear: 2n+1, Front: 0 -> Rear: n+1, Front:   n
    - Rear:   2n, Front: 0 -> Rear: n+1, Front: n-1
  - After
    - Rear: 2n+1, Front: 0 -> Rear:   n, Front: n+1
    - Rear:   2n, Front: 0 -> Rear:   n, Front:   n

It is same for F2r if switch the Rear and Front.
---
 lib/stdlib/src/queue.erl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/stdlib/src/queue.erl b/lib/stdlib/src/queue.erl
index 67ea0f8be4..1ff59af782 100644
--- a/lib/stdlib/src/queue.erl
+++ b/lib/stdlib/src/queue.erl
@@ -706,7 +706,7 @@ r2f([_]=R) ->
 r2f([X,Y]) ->
     {[X],[Y]};
 r2f(List) ->
-    {FF,RR} = lists:split(length(List) div 2 + 1, List),
+    {FF,RR} = lists:split(length(List) div 2, List),
     {FF,lists:reverse(RR, [])}.
 
 %% Move half of elements from F to R, if there are enough
@@ -717,5 +717,5 @@ f2r([_]=F) ->
 f2r([X,Y]) ->
     {[Y],[X]};
 f2r(List) ->
-    {FF,RR} = lists:split(length(List) div 2 + 1, List),
+    {FF,RR} = lists:split(length(List) div 2, List),
     {lists:reverse(RR, []),FF}.
-- 
2.34.1

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File 0397-Remove-unnecessary-1-for-pretty-move-half.patch of Package erlang (Revision 877ed1ba0ccb1ec39b610352f04989aa)

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