Fix formatting of call operator after init-list

[mwoehlke]

Correctly mark parentheses following a braced initializer list as a function call. (Specifically, this is invoking operator() of the just-constructed object.) Also, check for this when applying spaces so that we use sp_func_call_paren[_empty] rather than failing to match any rule and falling back to the default of always adding a space.

[mwoehlke]

Without this change, the output of the added test is:

auto x = foo{0} ();

(Note the incorrectly added space between } and ().)

[coveralls]

Pull Request Test Coverage Report for Build 4145

• 10 of 10 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.005%) to 86.577%

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Totals
Change from base Build 4141:	0.005%
Covered Lines:	19640
Relevant Lines:	22685

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💛 - Coveralls