Run buildifier over the directory. (#235)

Using the 1.0 release.

```
buildifier -r .
```

WORKSPACE

@@ -4,10 +4,10 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
 
 maybe(
-    repo_rule = http_archive,
     name = "bazel_federation",
-    url = "https://github.com/bazelbuild/bazel-federation/releases/download/0.0.1/bazel_federation-0.0.1.tar.gz",
+    repo_rule = http_archive,
     sha256 = "506dfbfd74ade486ac077113f48d16835fdf6e343e1d4741552b450cfc2efb53",
+    url = "https://github.com/bazelbuild/bazel-federation/releases/download/0.0.1/bazel_federation-0.0.1.tar.gz",
 )
 
 load("@bazel_federation//:repositories.bzl", "bazel_skylib_deps")
@@ -31,8 +31,8 @@ load("//:internal_setup.bzl", "bazel_skylib_internal_setup")
 bazel_skylib_internal_setup()
 
 maybe(
-    repo_rule = http_archive,
     name = "rules_cc",
+    repo_rule = http_archive,
     sha256 = "b4b2a2078bdb7b8328d843e8de07d7c13c80e6c89e86a09d6c4b424cfd1aaa19",
     strip_prefix = "rules_cc-cb2dfba6746bfa3c3705185981f3109f0ae1b893",
     urls = [

internal_setup.bzl

@@ -15,4 +15,4 @@
 """Setup function that must be invoked before running skylib tests."""
 
 def bazel_skylib_internal_setup():
-    pass # placeholder function for the federation
+    pass  # placeholder function for the federation

lib/new_sets.bzl

@@ -36,6 +36,7 @@ def _make(elements = None):
     Returns:
       A set containing the passed in values.
     """
+
     # If you change the structure of a set, you need to also update the _is_set method
     # in types.bzl.
     elements = elements if elements else []

lib/unittest.bzl

@@ -344,6 +344,7 @@ def _fail(env, msg):
       msg: The message to log describing the failure.
     """
     full_msg = "In test %s: %s" % (env.ctx.attr._impl_name, msg)
+
     # There isn't a better way to output the message in Starlark, so use print.
     # buildifier: disable=print
     print(full_msg)