Style fixups

diff --git a/.travis.yml b/.travis.yml
index a6a39d8..de7c294 100644
--- a/.travis.yml
+++ b/.travis.yml

@@ -5,8 +5,7 @@
     - TOXENV=py34
     - TOXENV=pypy
     - TOXENV=pypy3
-install:
-    - pip install coveralls tox
+install: pip install coveralls tox
 script: tox
 # Special snowflake.  Our tests depend on making real commits.
 before_install:

diff --git a/pre_commit_hooks/pretty_format_json.py b/pre_commit_hooks/pretty_format_json.py
index 6bcc9b0..916735c 100644
--- a/pre_commit_hooks/pretty_format_json.py
+++ b/pre_commit_hooks/pretty_format_json.py

@@ -9,8 +9,10 @@
 
 def _get_pretty_format(contents, indent, sort_keys=True):
     return simplejson.dumps(
-        simplejson.loads(contents,
-                         object_pairs_hook=None if sort_keys else OrderedDict),
+        simplejson.loads(
+            contents,
+            object_pairs_hook=None if sort_keys else OrderedDict,
+        ),
         sort_keys=sort_keys,
         indent=indent
     ) + "\n"  # dumps don't end with a newline
@@ -28,20 +30,20 @@
         '--autofix',
         action='store_true',
         dest='autofix',
-        help='Automatically fixes encountered not-pretty-formatted files'
+        help='Automatically fixes encountered not-pretty-formatted files',
     )
     parser.add_argument(
         '--indent',
         type=int,
         default=2,
-        help='Number of indent spaces used to pretty-format files'
+        help='Number of indent spaces used to pretty-format files',
     )
     parser.add_argument(
         '--no-sort-keys',
         action='store_true',
         dest='no_sort_keys',
         default=False,
-        help='Keep JSON nodes in the same order'
+        help='Keep JSON nodes in the same order',
     )
 
     parser.add_argument('filenames', nargs='*', help='Filenames to fix')
@@ -50,12 +52,13 @@
     status = 0
 
     for json_file in args.filenames:
-        try:
-            f = open(json_file, 'r')
+        with open(json_file) as f:
             contents = f.read()
-            f.close()
 
-            pretty_contents = _get_pretty_format(contents, args.indent, (not args.no_sort_keys))
+        try:
+            pretty_contents = _get_pretty_format(
+                contents, args.indent, sort_keys=not args.no_sort_keys,
+            )
 
             if contents != pretty_contents:
                 print("File {0} is not pretty-formatted".format(json_file))

diff --git a/tox.ini b/tox.ini
index 193d307..a9b17c0 100644
--- a/tox.ini
+++ b/tox.ini

@@ -1,7 +1,7 @@
 [tox]
 project = pre_commit_hooks
 # These should match the travis env list
-envlist = py26,py27,py33,py34,pypy,pypy3
+envlist = py27,py33,py34,pypy,pypy3
 
 [testenv]
 deps = -rrequirements-dev.txt