Code style improvements.
* wip/maintenance/code-style:
Correct over-long lines.
Explicitly enumerate items exported from the ‘daemon’ package.
Align closing bracket syntax with first line.
Correctly separate in-line comments.
Correct syntax for defining dictionary values.
Correct a typographical error.
Remove unused name bindings.
Correct idiom for identity comparator.
Correct ordering of import statements.
Remove unused imports.
Correct expected blank lines.