Keep encoding and newlines intact. Fixes #115.

[akaihola]

No description provided.

[sourcery-ai]

Sourcery Code Quality Report

❌  Merging this PR will decrease code quality in the affected files by 0.49%.

Quality metrics	Before	After	Change
Complexity	4.43 ⭐	3.89 ⭐	-0.54 👍
Method Length	55.07 ⭐	58.90 ⭐	3.83 👎
Working memory	10.60 😞	11.18 😞	0.58 👎
Quality	68.38% 🙂	67.89% 🙂	-0.49% 👎

Other metrics	Before	After	Change
Lines	1204	1481	277

Changed files	Quality Before	Quality After	Quality Change
src/darker/main.py	41.93% 😞	41.82% 😞	-0.11% 👎
src/darker/black_diff.py	80.07% ⭐	77.90% ⭐	-2.17% 👎
src/darker/import_sorting.py	73.82% 🙂	73.61% 🙂	-0.21% 👎
src/darker/utils.py	86.42% ⭐	82.78% ⭐	-3.64% 👎
src/darker/tests/test_black_diff.py	65.69% 🙂	63.63% 🙂	-2.06% 👎
src/darker/tests/test_git.py	64.02% 🙂	64.21% 🙂	0.19% 👍
src/darker/tests/test_import_sorting.py	74.66% 🙂	73.04% 🙂	-1.62% 👎
src/darker/tests/test_main.py	67.10% 🙂	65.22% 🙂	-1.88% 👎
src/darker/tests/test_utils.py	84.06% ⭐	78.33% ⭐	-5.73% 👎

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
src/darker/main.py	format_edited_parts	22 😞	212 ⛔	18 ⛔	27.41% 😞	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions
src/darker/main.py	main	16 🙂	215 ⛔	11 😞	40.57% 😞	Try splitting into smaller methods. Extract out complex expressions
src/darker/tests/test_main.py	test_main	0 ⭐	195 😞	28 ⛔	43.59% 😞	Try splitting into smaller methods. Extract out complex expressions
src/darker/tests/test_utils.py	test_textdocument_eq	0 ⭐	216 ⛔	21 ⛔	44.41% 😞	Try splitting into smaller methods. Extract out complex expressions
src/darker/tests/test_git.py	test_git_get_modified_files	4 ⭐	169 😞	17 ⛔	47.06% 😞	Try splitting into smaller methods. Extract out complex expressions

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