Why does git merge have so much trouble with Fedora package branches?

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I'm currently going through and bumping several packages whose Rawhide
builds have got behind their F16 builds.

I've come across several packages where git merge hit 'conflicts' for no
readily apparently reason in this case.

Take the current state of gnome-power-manager. Master is at:

commit dfd0f074a7d41d355da28180eae1bda5dc2bba66
Author: Richard Hughes <richard@xxxxxxxxxxx>
Date:   Mon Sep 26 16:58:28 2011 +0100

    New upstream version.

f16 is at:

commit b0b31219d2cfdffa815659a8aad78509b65c412a
Author: Richard Hughes <richard@xxxxxxxxxxx>
Date:   Mon Oct 17 11:34:50 2011 +0100

    New upstream version.

which is just a single commit ahead of the master branch. The git diff
is incredibly trivial:

[adamw@adam gnome-power-manager (f16)]$ git diff dfd0f074a7d41d355da28180eae1bda5dc2bba66
diff --git a/.gitignore b/.gitignore
index 7cf4a61..b9cba18 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ gnome-power-manager-2.31.4.tar.bz2
 /gnome-power-manager-3.1.90.tar.xz
 /gnome-power-manager-3.1.92.tar.xz
 /gnome-power-manager-3.2.0.tar.xz
+/gnome-power-manager-3.2.1.tar.xz
diff --git a/gnome-power-manager.spec b/gnome-power-manager.spec
index cba83e2..e5a512f 100644
--- a/gnome-power-manager.spec
+++ b/gnome-power-manager.spec
@@ -1,6 +1,6 @@
 Summary: GNOME power management service
 Name: gnome-power-manager
-Version: 3.2.0
+Version: 3.2.1
 Release: 1%{?dist}
 License: GPLv2+ and GFDL
 Group: Applications/System
@@ -75,6 +75,9 @@ glib-compile-schemas %{_datadir}/glib-2.0/schemas &> /dev/null
 %{_mandir}/man1/*.1.gz
 
 %changelog
+* Mon Oct 17 2011 Richard Hughes <rhughes@xxxxxxxxxx> - 3.2.1-1
+- New upstream version.
+
 * Mon Sep 26 2011 Richard Hughes <rhughes@xxxxxxxxxx> - 3.2.0-1
 - New upstream version.
 
diff --git a/sources b/sources
index 81e4f0f..2d18e7f 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-4dafea2ae923599685f91de033f23888  gnome-power-manager-3.2.0.tar.xz
+8e8a3759e0805041342c1f49471ee4ed  gnome-power-manager-3.2.1.tar.xz


But if you try and do a merge:

[adamw@adam gnome-power-manager (master)]$ git merge --no-ff b0b31219d2cfdffa815659a8aad78509b65c412a
Auto-merging sources
CONFLICT (content): Merge conflict in sources
Auto-merging gnome-power-manager.spec
CONFLICT (content): Merge conflict in gnome-power-manager.spec
Auto-merging .gitignore
CONFLICT (content): Merge conflict in .gitignore
Automatic merge failed; fix conflicts and then commit the result.

why the conflict? Why can it not merge this incredibly simple version
bump? I guess I'm just missing something about how git works, but I
can't really see why this causes a problem.

It's rather infuriating to have to go in and 'fix' a bunch of
'conflicts' which are not conflicts at all, but just the changes you
wanted to merge with a bunch of silly >>>> and <<<< around them.
-- 
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | identi.ca: adamwfedora
http://www.happyassassin.net

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