Make comments more consistent and clarify license

This improves the consistency of top-of-module comments as follows:

- All names of the current file are removed. Some included these
  while others didn't. In general, this can be useful information,
  which can remind readers and developers of what the file is and
  may even reduce mistakes. However, in GitPython, many modules
  inside git/ have the same name as other modules in other
  subdirectories of git/. So the presence of filenames would
  often be the same for multiple files, a condition that would be
  intensified if consistency were achieved by adding them
  everywhere. This instead removes them, which should (albeit
  slightly) decrease the risk of confusing modules that have the
  same name as each other.

- All modules (.py files) inside git/ and test/, except for .py
  files that are entirely empty (without even comments) or are
  inside test/fixtures/, now have comments indicating the license
  and linking to it on opensource.org. Previously, some modules
  had this, while others did not.

The comment about the license is short, and does not contain an
explicit copyright statement. No new explicit copyright statements
are added, but some top-of-modules already contained them, and this
does not remove (nor update or otherwise modify) them.

Although explicit copyright statements are not touched, all the
license comments are modified, including where they had previously
appeared, to say "the 3-Clause BSD License" instead of
"the BSD License", since there is no specific license known as the
"BSD License" (and both the 2-clause and 3-clause BSD licenses are
very popular).

This change should not be confused with gitpython-developers#1662, which fixed an
originally correct hyperlink that had come to redirect to a page
about a different license. The change here does not change the link
again. It makes the commented wording more specific, so that it is
clear, even without looking at the link, which BSD license is being
referred to.

git/__init__.py

@@ -1,8 +1,7 @@
-# __init__.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 # flake8: noqa
 # @PydevCodeAnalysisIgnore

git/cmd.py

@@ -1,8 +1,7 @@
-# cmd.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 from __future__ import annotations
 

git/compat.py

@@ -1,8 +1,7 @@
-# compat.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 """Utilities to help provide compatibility with Python 3."""
 

git/config.py

@@ -1,8 +1,7 @@
-# config.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 """Module containing module parser implementation able to properly read and write
 configuration files."""

git/db.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Module with our own gitdb implementation - it uses the git command."""
 
 from git.util import bin_to_hex, hex_to_bin

git/diff.py

@@ -1,8 +1,7 @@
-# diff.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 import re
 from git.cmd import handle_process_output

git/exc.py

@@ -1,8 +1,7 @@
-# exc.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 """Module containing all exceptions thrown throughout the git package."""
 

git/index/__init__.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Initialize the index package."""
 
 # flake8: noqa

git/index/base.py

@@ -1,8 +1,7 @@
-# base.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 from contextlib import ExitStack
 import datetime

git/index/fun.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 # Standalone functions to accompany the index implementation and make it more versatile.
 # NOTE: Autodoc hates it if this is a docstring.
 

git/index/typ.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Module with additional types used by the index."""
 
 from binascii import b2a_hex

git/index/util.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Module containing index utilities."""
 
 from functools import wraps

git/objects/__init__.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Import all submodules' main classes into the package space."""
 
 # flake8: noqa

git/objects/base.py

@@ -1,8 +1,7 @@
-# base.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 from git.exc import WorkTreeRepositoryUnsupported
 from git.util import LazyMixin, join_path_native, stream_copy, bin_to_hex

git/objects/blob.py

@@ -1,8 +1,7 @@
-# blob.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 from mimetypes import guess_type
 from . import base

git/objects/commit.py

@@ -1,8 +1,7 @@
-# commit.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 import datetime
 import re

git/objects/fun.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Module with functions which are supposed to be as fast as possible."""
 
 from stat import S_ISDIR

git/objects/submodule/__init__.py

@@ -1,2 +1,5 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 # NOTE: Cannot import anything here as the top-level __init__ has to handle
 # our dependencies.

git/objects/submodule/base.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 from io import BytesIO
 import logging
 import os

git/objects/submodule/root.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 from .base import Submodule, UpdateProgress
 from .util import find_first_remote_branch
 from git.exc import InvalidGitRepositoryError

git/objects/submodule/util.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 import git
 from git.exc import InvalidGitRepositoryError
 from git.config import GitConfigParser

git/objects/tag.py

@@ -1,8 +1,7 @@
-# tag.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 """Module containing all Object-based types."""
 

git/objects/tree.py

@@ -1,8 +1,7 @@
-# tree.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 from git.util import IterableList, join_path
 import git.diff as git_diff

git/objects/util.py

@@ -1,8 +1,7 @@
-# util.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 """Module for general utility functions."""
 

git/refs/__init__.py

@@ -1,5 +1,9 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 # flake8: noqa
 # Import all modules in order, fix the names they require.
+
 from .symbolic import *
 from .reference import *
 from .head import *

git/refs/head.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 from git.config import GitConfigParser, SectionConstraint
 from git.util import join_path
 from git.exc import GitCommandError

git/refs/log.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 from mmap import mmap
 import re
 import time as _time

git/refs/reference.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 from git.util import (
     LazyMixin,
     IterableObj,

git/refs/remote.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 import os
 
 from git.util import join_path

git/refs/symbolic.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 from git.types import PathLike
 import os
 

git/refs/tag.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 from .reference import Reference
 
 __all__ = ["TagReference", "Tag"]

git/remote.py

@@ -1,8 +1,7 @@
-# remote.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 """Module implementing a remote object allowing easy access to git remotes."""
 

git/repo/__init__.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Initialize the Repo package."""
 
 # flake8: noqa

git/repo/base.py

@@ -1,8 +1,7 @@
-# base.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 from __future__ import annotations
 

git/repo/fun.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Module with general repository-related functions."""
 
 from __future__ import annotations

git/types.py

@@ -1,5 +1,5 @@
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 # flake8: noqa
 

git/util.py

@@ -1,8 +1,7 @@
-# util.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 from abc import abstractmethod
 import contextlib

test/__init__.py

@@ -1,5 +1,4 @@
-# __init__.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/

test/lib/__init__.py

@@ -1,8 +1,7 @@
-# __init__.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 # flake8: noqa
 import inspect

test/lib/helper.py

@@ -1,8 +1,7 @@
-# helper.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 import contextlib
 from functools import wraps

test/performance/lib.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Support library for tests."""
 
 import logging

test/performance/test_commit.py

@@ -1,7 +1,7 @@
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 """Performance tests for commits (iteration, traversal, and serialization)."""
 

test/performance/test_odb.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Performance tests for object store."""
 
 import sys

test/performance/test_streams.py

@@ -1,3 +1,6 @@
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
+
 """Performance tests for data streaming."""
 
 import os

test/test_actor.py

@@ -1,8 +1,7 @@
-# test_actor.py
 # Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
 #
-# This module is part of GitPython and is released under
-# the BSD License: https://opensource.org/license/bsd-3-clause/
+# This module is part of GitPython and is released under the
+# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 from test.lib import TestBase
 from git import Actor