(vhdl-components-package-name, vhdl-get-library-unit, vhdl-corresponding-begin,

(vhdl-components-package-name, vhdl-get-library-unit, vhdl-corresponding-begin,
vhdl-skip-case-alternative, vhdl-backward-skip-label, vhdl-align-region-2,
vhdl-electric-dash, vhdl-case-word, vhdl-hooked-abbrev,
vhdl-hs-forward-sexp-func, vhdl-font-lock-match-item): Fix typos in docstrings.
(vhdl-get-library-unit, vhdl-get-block-state, vhdl-sort-alist, vhdl-set-offset,
vhdl-fix-case-region-1, vhdl-scan-directory-contents,
vhdl-speedbar-insert-project-hierarchy): Improve argument/docstring consistency.