swift234

[SourceKit] Avoid expanding the last argument as trailing closure if there are other closures in the tuple. rdar://23428366 (#3408)

SourceKit invariantly expands the last argument in a function call as trailing closure,
if it is of function type. However, there are situations when inline closures
are preferred; for example, when the last argument is not the only closure in the function
call. This patch modifies SourceKit so that when the argument contains multiple closures,
the last argument is expanded as inline closure.