assorted minor fixes

[fametrano]

No description provided.

[sourcery-ai]

Sourcery Code Quality Report

✅  Merging this PR will increase code quality in the affected files by 0.02%.

Quality metrics	Before	After	Change
Complexity	4.76 ⭐	4.74 ⭐	-0.02 👍
Method Length	71.14 🙂	71.14 🙂	0.00
Working memory	8.23 🙂	8.23 🙂	0.00
Quality	68.71% 🙂	68.73% 🙂	0.02% 👍

Other metrics	Before	After	Change
Lines	2421	2420	-1

Changed files	Quality Before	Quality After	Quality Change
btclib/number_theory.py	59.06% 🙂	59.06% 🙂	0.00%
btclib/utils.py	81.99% ⭐	81.99% ⭐	0.00%
btclib/ec/curve_group.py	69.45% 🙂	69.45% 🙂	0.00%
btclib/ecc/bms.py	62.89% 🙂	62.94% 🙂	0.05% 👍
btclib/ecc/dsa.py	67.02% 🙂	67.04% 🙂	0.02% 👍
btclib/ecc/ssa.py	69.02% 🙂	69.05% 🙂	0.03% 👍
btclib/tx/tx.py	74.62% 🙂	74.62% 🙂	0.00%

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

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
btclib/ecc/ssa.py	assert_batch_as_valid_	10 🙂	311 ⛔	13 😞	37.95% 😞	Try splitting into smaller methods. Extract out complex expressions
btclib/ecc/bms.py	assert_as_valid	18 🙂	217 ⛔	10 😞	40.77% 😞	Try splitting into smaller methods. Extract out complex expressions
btclib/ec/curve_group.py	CurveGroup.__init__	13 🙂	224 ⛔	11 😞	42.48% 😞	Try splitting into smaller methods. Extract out complex expressions
btclib/ec/curve_group.py	_multi_mult	11 🙂	202 😞	12 😞	44.01% 😞	Try splitting into smaller methods. Extract out complex expressions
btclib/number_theory.py	tonelli	16 🙂	209 ⛔	9 🙂	44.93% 😞	Try splitting into smaller methods

Legend and Explanation

The emojis denote the absolute quality of the code:

• ⭐ excellent
• 🙂 good
• 😞 poor
• ⛔ very poor

The 👍 and 👎 indicate whether the quality has improved or gotten worse with this pull request.

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