[Formatter] Fix space between call name and parenthesized arg

[straight-shoota]

When you have a call with a space between the method name and the arguments: foo (1). It is parsed as a call without parenthesis with a single arg which is itself wrapped in parenthesis.

The space is probably not intended here and the parenthesis of the argument is strictly not necessary. Most likely, this should have been written without a space as a parenthesized call.

This patch to the formatter removes that space. There should not be any semantical change because it only applies to a call with a single arg. Calls with multiple args like foo (1), 2 are not affected.

Related note: A call like foo (1, 2) is invalid syntax, so this only applies to calls that have a single argument before and after the space was removed.

This has been spotted in #11485 (comment)

[straight-shoota]

It's actually a surprising number of instances where this change has triggered in this repo. Interestingly, the vast majority is eq calls in specs.

229d6a4 (#11523)

[HertzDevil]

The Expressions must also have a size of 1, otherwise foo (1; 2) will be formatted to foo(1; 2), which is invalid code.