cmds: staticmethod should not have classmethod arguments
cmds: call BaseCommand.__init__ in LaunchTerminal class
diffparse: Fix erroneous return tuple
widgets/browse: Call BaseCommand.__init__ in SaveBlob
widgets/completion: Fix indentation in CompletionLineEdit
widgets/spellcheck: Fix indentation missing a space in edits1()
qtutils: Fix missing backslash in regex in DiffSyntaxHighlighter
widgets/spellcheck: Fix missing backslash in Highlighter
Merge pull request #229 from achernet/bug_fixes_194

Fix various buglets.

Signed-off-by: David Aguilar <davvid@gmail.com>