add missing parens

this eliminated some of errors I've been getting, still looking at what might be causing `Invalid face reference: diff-refine-added' messages.
Remove modification of safe-local-eval-forms

An installed package isn't entitled to decide for the user that certain
local variable forms are safe: instead, theme authors should accept the
forms as safe when they open the source code.
Merge pull request #178 from purcell/patch-1

Remove modification of safe-local-eval-forms
Merge pull request #170 from ukaszg/patch-1

add missing parens