Recover the complicated situation after my bad merge

I made a mistake merge.  Reverting it in c778945806 undid the state
on master, but now I realize it crippled the git merge mechanism.
As the merge contained a mix of commits from `master..staging-next`
and other commits from `staging-next..staging`, it got the
`staging-next` branch into a state that was difficult to recover.

I reconstructed the "desired" state of staging-next tree by:
 - checking out the last commit of the problematic range: 4effe769e2
 - `git rebase -i --preserve-merges a8a018ddc0` - dropping the mistaken
   merge commit and its revert from that range (while keeping
   reapplication from 4effe769e2)
 - merging the last unaffected staging-next commit (803ca85c20)
 - fortunately no other commits have been pushed to staging-next yet
 - applying a diff on staging-next to get it into that state

pkgs/shells/bash/bash-completion/default.nix

@@ -9,13 +9,13 @@
 
 stdenv.mkDerivation rec {
   pname = "bash-completion";
-  version = "2.10";
+  version = "2.11";
 
   src = fetchFromGitHub {
     owner = "scop";
     repo = "bash-completion";
     rev = version;
-    sha256 = "047yjryy9d6hp18wkigbfrw9r0sm31inlsp8l28fhxg8ii032sgq";
+    sha256 = "0m3brd5jx7w07h8vxvvcmbyrlnadrx6hra3cvx6grzv6rin89liv";
   };
 
   nativeBuildInputs = [ autoreconfHook ];