nix-info: Format files with nixfmt

This is a rare case of a Nix file actually ending up in the build result.
We reformat this now, causing a rebuild, so that we won't cause a rebuild
in the treewide reformatting PR.

pkgs/tools/nix/info/multiuser.nix

@@ -1,12 +1,11 @@
 let
-  pkgs = import <nixpkgs> {};
-in pkgs.runCommand "diagnostics-multiuser"
-  {  }
-  ''
-    set -x
-    # no cache: ${toString builtins.currentTime}
-    # For reproducibility, nix always uses nixbld group:
-    # https://github.com/NixOS/nix/blob/1dd29d7aebae706f3e90a18bbfae727f2ed03c70/src/libstore/build.cc#L1896-L1908
-    test "$(groups)" == "nixbld"
-    touch $out
-  ''
+  pkgs = import <nixpkgs> { };
+in
+pkgs.runCommand "diagnostics-multiuser" { } ''
+  set -x
+  # no cache: ${toString builtins.currentTime}
+  # For reproducibility, nix always uses nixbld group:
+  # https://github.com/NixOS/nix/blob/1dd29d7aebae706f3e90a18bbfae727f2ed03c70/src/libstore/build.cc#L1896-L1908
+  test "$(groups)" == "nixbld"
+  touch $out
+''

pkgs/tools/nix/info/relaxedsandbox.nix

@@ -1,6 +1,7 @@
 let
-  pkgs = import <nixpkgs> {};
-in pkgs.runCommand "diagnostics-sandbox"
+  pkgs = import <nixpkgs> { };
+in
+pkgs.runCommand "diagnostics-sandbox"
   {
     __noChroot = true;
   }

pkgs/tools/nix/info/sandbox.nix

@@ -1,10 +1,9 @@
 let
-  pkgs = import <nixpkgs> {};
-in pkgs.runCommand "diagnostics-sandbox"
-  { }
-  ''
-    set -x
-    # no cache: ${toString builtins.currentTime}
-    test -d "$(dirname "$out")/../var/nix"
-    touch $out
-  ''
+  pkgs = import <nixpkgs> { };
+in
+pkgs.runCommand "diagnostics-sandbox" { } ''
+  set -x
+  # no cache: ${toString builtins.currentTime}
+  test -d "$(dirname "$out")/../var/nix"
+  touch $out
+''