||Various very small improvements.
- Removes some excess trailing space from some files.
- Slightly improves wording of some text in some files.
- Fixes some indenting and brace placements in some files.
- Adds some missing terminating linebreaks to some files.
- Removes unneeded closing tags from some files.
- Aligns operator spacing more closely with PSR specs.
- Simplifies a few simple true/false checks in the codebase.
- No features/functionality added/removed with this commit.
- No backwards-incompatible changes.