Suppress byte-compilation warning

This takes care of the byte-compilation warning
about a reference to a free variable `paredit-version`.
Fix a couple of docstrings and indentation errors.
Use should instead of assert in tests.
Docstring additions and fixes.
Merge pull request #223 from bbatsov/fix-warning

Suppress byte-compilation warning
Merge pull request #224 from bbatsov/use-should

Use should instead of assert in tests.
Merge pull request #225 from bbatsov/cleanup

Docstring and identation cleanup
Simplify popup buffer quit/restore using `quit-window'.
Update copyright year and add link to contributors.
Merge branch 'popup-refactor'