treewide: format all inactive Nix files

After final improvements to the official formatter implementation,
this commit now performs the first treewide reformat of Nix files using it.
This is part of the implementation of RFC 166.

Only "inactive" files are reformatted, meaning only files that
aren't being touched by any PR with activity in the past 2 months.
This is to avoid conflicts for PRs that might soon be merged.
Later we can do a full treewide reformat to get the rest,
which should not cause as many conflicts.

A CI check has already been running for some time to ensure that new and
already-formatted files are formatted, so the files being reformatted here
should also stay formatted.

This commit was automatically created and can be verified using

    nix-build a08b3a4d19.tar.gz \
      --argstr baseRev b32a094368
    result/bin/apply-formatting $NIXPKGS_PATH

lib/tests/test-with-nix.nix

@@ -1,12 +1,12 @@
 /**
- * Instantiate the library tests for a given Nix version.
- *
- * IMPORTANT:
- * This is used by the github.com/NixOS/nix CI.
- *
- * Try not to change the interface of this file, or if you need to, ping the
- * Nix maintainers for help. Thank you!
- */
+  Instantiate the library tests for a given Nix version.
+
+  IMPORTANT:
+  This is used by the github.com/NixOS/nix CI.
+
+  Try not to change the interface of this file, or if you need to, ping the
+  Nix maintainers for help. Thank you!
+*/
 {
   pkgs,
   lib,
@@ -14,67 +14,69 @@
   nix,
 }:
 
-pkgs.runCommand "nixpkgs-lib-tests-nix-${nix.version}" {
-  buildInputs = [
-    (import ./check-eval.nix)
-    (import ./fetchers.nix)
-    (import ./maintainers.nix {
-      inherit pkgs;
-      lib = import ../.;
-    })
-    (import ./teams.nix {
-      inherit pkgs;
-      lib = import ../.;
-    })
-    (import ../path/tests {
-      inherit pkgs;
-    })
-  ];
-  nativeBuildInputs = [
-    nix
-    pkgs.gitMinimal
-  ] ++ lib.optional pkgs.stdenv.hostPlatform.isLinux pkgs.inotify-tools;
-  strictDeps = true;
-} ''
-  datadir="${nix}/share"
-  export TEST_ROOT=$(pwd)/test-tmp
-  export HOME=$(mktemp -d)
-  export NIX_BUILD_HOOK=
-  export NIX_CONF_DIR=$TEST_ROOT/etc
-  export NIX_LOCALSTATE_DIR=$TEST_ROOT/var
-  export NIX_LOG_DIR=$TEST_ROOT/var/log/nix
-  export NIX_STATE_DIR=$TEST_ROOT/var/nix
-  export NIX_STORE_DIR=$TEST_ROOT/store
-  export PAGER=cat
-  cacheDir=$TEST_ROOT/binary-cache
-
-  nix-store --init
-
-  cp -r ${../.} lib
-  echo "Running lib/tests/modules.sh"
-  bash lib/tests/modules.sh
-
-  echo "Checking lib.version"
-  nix-instantiate lib -A version --eval || {
-    echo "lib.version does not evaluate when lib is isolated from the rest of the nixpkgs tree"
-    exit 1
+pkgs.runCommand "nixpkgs-lib-tests-nix-${nix.version}"
+  {
+    buildInputs = [
+      (import ./check-eval.nix)
+      (import ./fetchers.nix)
+      (import ./maintainers.nix {
+        inherit pkgs;
+        lib = import ../.;
+      })
+      (import ./teams.nix {
+        inherit pkgs;
+        lib = import ../.;
+      })
+      (import ../path/tests {
+        inherit pkgs;
+      })
+    ];
+    nativeBuildInputs = [
+      nix
+      pkgs.gitMinimal
+    ] ++ lib.optional pkgs.stdenv.hostPlatform.isLinux pkgs.inotify-tools;
+    strictDeps = true;
   }
+  ''
+    datadir="${nix}/share"
+    export TEST_ROOT=$(pwd)/test-tmp
+    export HOME=$(mktemp -d)
+    export NIX_BUILD_HOOK=
+    export NIX_CONF_DIR=$TEST_ROOT/etc
+    export NIX_LOCALSTATE_DIR=$TEST_ROOT/var
+    export NIX_LOG_DIR=$TEST_ROOT/var/log/nix
+    export NIX_STATE_DIR=$TEST_ROOT/var/nix
+    export NIX_STORE_DIR=$TEST_ROOT/store
+    export PAGER=cat
+    cacheDir=$TEST_ROOT/binary-cache
 
-  echo "Running lib/tests/filesystem.sh"
-  TEST_LIB=$PWD/lib bash lib/tests/filesystem.sh
+    nix-store --init
 
-  echo "Running lib/tests/sources.sh"
-  TEST_LIB=$PWD/lib bash lib/tests/sources.sh
+    cp -r ${../.} lib
+    echo "Running lib/tests/modules.sh"
+    bash lib/tests/modules.sh
 
-  echo "Running lib/tests/network.sh"
-  TEST_LIB=$PWD/lib bash lib/tests/network.sh
+    echo "Checking lib.version"
+    nix-instantiate lib -A version --eval || {
+      echo "lib.version does not evaluate when lib is isolated from the rest of the nixpkgs tree"
+      exit 1
+    }
 
-  echo "Running lib/fileset/tests.sh"
-  TEST_LIB=$PWD/lib bash lib/fileset/tests.sh
+    echo "Running lib/tests/filesystem.sh"
+    TEST_LIB=$PWD/lib bash lib/tests/filesystem.sh
 
-  echo "Running lib/tests/systems.nix"
-  [[ $(nix-instantiate --eval --strict lib/tests/systems.nix | tee /dev/stderr) == '[ ]' ]];
+    echo "Running lib/tests/sources.sh"
+    TEST_LIB=$PWD/lib bash lib/tests/sources.sh
 
-  mkdir $out
-  echo success > $out/${nix.version}
-''
+    echo "Running lib/tests/network.sh"
+    TEST_LIB=$PWD/lib bash lib/tests/network.sh
+
+    echo "Running lib/fileset/tests.sh"
+    TEST_LIB=$PWD/lib bash lib/fileset/tests.sh
+
+    echo "Running lib/tests/systems.nix"
+    [[ $(nix-instantiate --eval --strict lib/tests/systems.nix | tee /dev/stderr) == '[ ]' ]];
+
+    mkdir $out
+    echo success > $out/${nix.version}
+  ''