[SourceKit] Avoid adding indentation at the end of a CaptureListExpr. rdar://28193169

Author: nkcsgexi

lib/IDE/Formatting.cpp

@@ -366,7 +366,8 @@ class FormatContext {
     Expr *AtExprEnd = End.getAsExpr();
     if (AtExprEnd && (isa<ClosureExpr>(AtExprEnd) ||
                       isa<ParenExpr>(AtExprEnd) ||
-                      isa<TupleExpr>(AtExprEnd))) {
+                      isa<TupleExpr>(AtExprEnd) ||
+                      isa<CaptureListExpr>(AtExprEnd))) {
 
       if (auto *Paren = dyn_cast_or_null<ParenExpr>(Cursor->getAsExpr())) {
         auto *SubExpr = Paren->getSubExpr();

test/SourceKit/CodeFormat/indent-closure.swift

@@ -32,6 +32,16 @@ func foo4() {
     }()
 }
 
+func foo5(input: Int, block: (Int) -> ()) -> Int {
+  return 0
+}
+
+func foo6() {
+  _ = foo5(input: 0, block: { [unowned self] blockInput in
+    foo4()
+  })
+}
+
 // RUN: %sourcekitd-test -req=format -line=3 -length=1 %s >%t.response
 // RUN: %sourcekitd-test -req=format -line=4 -length=1 %s >>%t.response
 // RUN: %sourcekitd-test -req=format -line=5 -length=1 %s >>%t.response
@@ -46,6 +56,7 @@ func foo4() {
 // RUN: %sourcekitd-test -req=format -line=30 -length=1 %s >>%t.response
 // RUN: %sourcekitd-test -req=format -line=31 -length=1 %s >>%t.response
 // RUN: %sourcekitd-test -req=format -line=32 -length=1 %s >>%t.response
+// RUN: %sourcekitd-test -req=format -line=42 -length=1 %s >>%t.response
 // RUN: %FileCheck --strict-whitespace %s <%t.response
 
 // CHECK: key.sourcetext: "        var abc = 1"
@@ -68,3 +79,5 @@ func foo4() {
 // CHECK: key.sourcetext: "    let test = {"
 // CHECK: key.sourcetext: "        return 0"
 // CHECK: key.sourcetext: "    }()"
+
+// CHECK: key.sourcetext: "  })"