[shellcheck] errors

[foxjaw]

In /usr/share/bash-complete-alias/complete_alias line 296:
            elif [[ '(' == "${str:j:1}" ]]; then
            ^-- SC1009 (info): The mentioned syntax error was in this elif clause.
                 ^-- SC1073 (error): Couldn't parse this test expression. Fix to allow more checks.
                    ^-- SC1029 (error): In [[..]] you shouldn't escape ( or ).
                        ^-- SC1108 (error): You need a space before and after the == .
                            ^-- SC1072 (error): Expected comparison operator (don't wrap commands in []/[[]]). Fix any mentioned problems and try again.

For more information:
  https://www.shellcheck.net/wiki/SC1029 -- In [[..]] you shouldn't escape ( ...
  https://www.shellcheck.net/wiki/SC1108 -- You need a space before and after...
  https://www.shellcheck.net/wiki/SC1072 -- Expected comparison operator (don...