PEP-8 code style changes

[bschoening]

Mostly whitespace fixes for PEP-8

[Copilot]

Pull request overview

This PR applies PEP 8–oriented formatting changes across the driver codebase (whitespace, indentation, docstring quoting, and comment cleanup), with a couple of small typo/wording fixes.

Changes:

• Normalizes whitespace/indentation and adds blank lines for readability across multiple modules.
• Updates docstrings/comments for consistency (e.g., triple-quoted docstrings, TODO spacing).
• Includes a few minor typo/wording corrections (e.g., “errro” → “error”, “useable” → “usable”).

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
cassandra/util.py	Import placement/spacing and docstring/comment formatting updates.
cassandra/timestamps.py	Adds a separating blank line before the first class definition.
cassandra/query.py	Adds spacing between functions; fixes TODO spacing; normalizes indentation in HostTargetingStatement.
cassandra/protocol.py	Adds a separating blank line before module-level constants.
cassandra/pool.py	Removes line-continuation backslashes in dict literals; fixes “usable” spelling.
cassandra/policies.py	Moves cassandra imports into the main import block; adds spacing before a class definition.
cassandra/murmur3.py	Adds a separating blank line before the optional C-extension import block.
cassandra/metrics.py	Re-indents scales.collection(...) call for readability/alignment.
cassandra/metadata.py	Reorders the optional murmur3 import block; minor formatting changes in string building and spacing.
cassandra/marshal.py	Adds blank lines and normalizes spacing in packing/unpacking helpers.
cassandra/encoder.py	Moves logger initialization to follow import grouping and normalizes indentation.
cassandra/cqltypes.py	Moves ipaddress import into the main import block; adds spacing and refines comments/line wrapping.
cassandra/connection.py	Removes stray semicolon; normalizes spacing in expressions and dict comprehensions; comment spacing cleanup.
cassandra/concurrent.py	Wraps long function signature and normalizes spacing between top-level defs.
cassandra/cluster.py	Normalizes spacing/indentation and slightly refines comments/docstrings.
cassandra/auth.py	Adds separating blank line before module alias/compat assignment.
cassandra/init.py	Adds separating blank lines; fixes a typo in an exception docstring.

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[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 2 comments.