only call recase_file once

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

pipenv/cli.py

@@ -174,6 +174,8 @@ def ensure_pipfile(validate=True):
                     else:
                         project.add_package_to_pipfile(str(package.req))
 
+            project.recase_pipfile()
+
         else:
             click.echo(crayons.yellow('Creating a Pipfile for this project...'), err=True)
             # Create the pipfile if it doesn't exist.

pipenv/project.py

@@ -273,4 +273,7 @@ class Project(object):
         p[key][package_name] = package[package_name]
 
         # Write Pipfile.
-        self.write_toml(recase_file(p))
+        self.write_toml(p)
+
+    def recase_pipfile(self):
+        self.write_toml(recase_file(self._pipfile))