[python] Use PEP-0008 compliant code headers

Running the Python style guide checker
[`pep8`](https://pypi.python.org/pypi/pep8) on the Python code headers
in this repository results in the following error being emitted:

    $ pep8 utils/build-script
    utils/build-script:1:1: E265 block comment should start with '# '
    utils/build-script:3:1: E266 too many leading '#' for block comment
    utils/build-script:5:1: E266 too many leading '#' for block comment
    utils/build-script:6:1: E266 too many leading '#' for block comment
    utils/build-script:8:1: E266 too many leading '#' for block comment
    utils/build-script:9:1: E266 too many leading '#' for block comment
    utils/build-script:11:1: E265 block comment should start with '# '
    utils/build-script:11:80: E501 line too long (80 > 79 characters)

The problem is that the code header used in most Python files in the
repository:

1. Do not place a space in between `#` and the rest of the comment.
2. Contains some lines that just barely exceed the recommend length
   limit.

In addition, not all code headers in the repository follow the same
template.

This commit moves all Python code headers to the following template:

    # subfolder/file_name.py - Very brief description -*- python -*--
    #
    # This source file is part of the Swift.org open source project
    #
    # Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
    # Licensed under Apache License v2.0 with Runtime Library Exception
    #
    # See http://swift.org/LICENSE.txt for license information
    # See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
    #
    # -----------------------------------------------------------------------------
    #
    # This file contains stuff that I am describing here in the header and will
    # be sure to keep up to date.
    #
    # ----------------------------------------------------------------------------

Author: modocache

stdlib/public/common/MirrorCommon.py

@@ -1,17 +1,20 @@
-#//===--- MirrorCommon.py -------------------------------------*- python -*-===//
-#//
-#// This source file is part of the Swift.org open source project
-#//
-#// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
-#// Licensed under Apache License v2.0 with Runtime Library Exception
-#//
-#// See http://swift.org/LICENSE.txt for license information
-#// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-#//
-#//===----------------------------------------------------------------------===//
+# MirrorCommon.py -*- python -*-
+#
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See http://swift.org/LICENSE.txt for license information
+# See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+#
+# -----------------------------------------------------------------------------
+#
 # This file contains utility functions that are used by the gyb template files
 # that generate Mirrors for the Swift Standard Library.
 # If you edit this, make sure to also accordingly tweak the actual template files.
+#
+# -----------------------------------------------------------------------------
 
 def getDisposition(disp=None):
   if disp is None:

test/Unit/lit.cfg

@@ -1,6 +1,12 @@
-# -*- Python -*-
-
-# Configuration file for the 'lit' test runner.
+# test/Unit/lit.cfg - Configuration for the 'lit' test runner. -*- python -*-
+#
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See http://swift.org/LICENSE.txt for license information
+# See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
 import os
 

test/lit.cfg

@@ -1,22 +1,22 @@
-##===--- lit.cfg ---------------------------------------------*- Python -*-===##
-##
-## This source file is part of the Swift.org open source project
-##
-## Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
-## Licensed under Apache License v2.0 with Runtime Library Exception
-##
-## See http://swift.org/LICENSE.txt for license information
-## See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-##
-##===----------------------------------------------------------------------===##
+# swift/test/lit.cfg - Configuration for the 'lit' test runner -*- python -*-
+#
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See http://swift.org/LICENSE.txt for license information
+# See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+#
+# -----------------------------------------------------------------------------
 #
 # This is a configuration file for the 'lit' test runner.
 #
 # Refer to docs/Testing.rst for documentation.
 #
 # Update docs/Testing.rst when changing this file.
 #
-##===----------------------------------------------------------------------===##
+# -----------------------------------------------------------------------------
 
 import os
 import platform

tools/SourceKit/bindings/python/sourcekitd/__init__.py

@@ -1,4 +1,4 @@
-#===- __init__.py - sourcekitd Python Bindings ---------------*- python -*--===#
+# __init__.py - sourcekitd Python Bindings -*- python -*-
 #
 # This source file is part of the Swift.org open source project
 #
@@ -7,8 +7,6 @@
 #
 # See http://swift.org/LICENSE.txt for license information
 # See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-#
-#===------------------------------------------------------------------------===#
 
 r"""
 sourcekitd framework bindings

tools/SourceKit/bindings/python/sourcekitd/capi.py

@@ -1,4 +1,4 @@
-#===- capi.py - sourcekitd Python Bindings -------------------*- python -*--===#
+# capi.py - sourcekitd Python Bindings -*- python -*-
 #
 # This source file is part of the Swift.org open source project
 #
@@ -7,8 +7,6 @@
 #
 # See http://swift.org/LICENSE.txt for license information
 # See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-#
-#===------------------------------------------------------------------------===#
 
 from ctypes import (
     CFUNCTYPE,

tools/SourceKit/bindings/python/sourcekitd/request.py

@@ -1,4 +1,4 @@
-#===- request.py - sourcekitd Python Bindings ----------------*- python -*--===#
+# request.py - sourcekitd Python Bindings -*- python -*-
 #
 # This source file is part of the Swift.org open source project
 #
@@ -7,8 +7,6 @@
 #
 # See http://swift.org/LICENSE.txt for license information
 # See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-#
-#===------------------------------------------------------------------------===#
 
 import capi
 

utils/SwiftBuildSupport.py

@@ -1,4 +1,4 @@
-#===--- SwiftBuildSupport.py - Utilities for Swift build scripts -----------===#
+# utils/SwiftBuildSupport.py - Utilities for Swift build scripts -*- python -*-
 #
 # This source file is part of the Swift.org open source project
 #
@@ -7,8 +7,6 @@
 #
 # See http://swift.org/LICENSE.txt for license information
 # See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-#
-#===------------------------------------------------------------------------===#
 
 from __future__ import print_function
 

utils/apply-fixit-edits.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python
-
-#===--- apply-fixit-edits.py - Tool for applying edits from .remap files ---===#
+# utils/apply-fixit-edits.py - Apply edits from .remap files -*- python -*-
 #
 # This source file is part of the Swift.org open source project
 #
@@ -9,8 +8,6 @@
 #
 # See http://swift.org/LICENSE.txt for license information
 # See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-#
-#===------------------------------------------------------------------------===#
 
 from __future__ import print_function
 

utils/build-script

@@ -1,15 +1,13 @@
 #!/usr/bin/env python
-#===--- build-script - The ultimate tool for building Swift ----------------===#
+# utils/build-script - The ultimate tool for building Swift -*- python -*-
 #
-## This source file is part of the Swift.org open source project
-##
-## Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
-## Licensed under Apache License v2.0 with Runtime Library Exception
-##
-## See http://swift.org/LICENSE.txt for license information
-## See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+# This source file is part of the Swift.org open source project
 #
-#===------------------------------------------------------------------------===#
+# Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See http://swift.org/LICENSE.txt for license information
+# See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
 from __future__ import print_function
 

utils/sil-opt-verify-all-modules.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-#===------------------------------------------------------------------------===#
+# utils/sil-opt-verify-all-modules.py - Verifies Swift modules -*- python -*-
 #
 # This source file is part of the Swift.org open source project
 #
@@ -8,8 +8,6 @@
 #
 # See http://swift.org/LICENSE.txt for license information
 # See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-#
-#===------------------------------------------------------------------------===#
 
 from __future__ import print_function