Support InlineArray type sugar

Author: TTOzzi

Sources/SwiftFormat/PrettyPrint/TokenStreamCreator.swift

@@ -1732,6 +1732,12 @@ fileprivate final class TokenStreamCreator: SyntaxVisitor {
     return .visitChildren
   }
 
+  override func visit(_ node: InlineArrayTypeSyntax) -> SyntaxVisitorContinueKind {
+    before(node.separator, tokens: .space)
+    after(node.separator, tokens: .space)
+    return .visitChildren
+  }
+
   override func visit(_ node: TupleTypeSyntax) -> SyntaxVisitorContinueKind {
     after(node.leftParen, tokens: .break(.open, size: 0), .open)
     before(node.rightParen, tokens: .break(.close, size: 0), .close)

Tests/SwiftFormatTests/PrettyPrint/ArrayDeclTests.swift

@@ -302,4 +302,58 @@ final class ArrayDeclTests: PrettyPrintTestCase {
 
     assertPrettyPrintEqual(input: input, expected: expected, linelength: 32)
   }
+
+  func testInlineArrayTypeSugar() {
+    let input =
+      """
+      let a: [3 of Int]
+      let a: [[3 of Int]]
+      let a: [[Int of 3]]
+      let a: [_ of Int]
+      let a: [Int of Int]
+      let a: [@escaping () -> Int of Int]
+      let a: [Int.Type of Int]
+      let a: [sending P & Q of Int]
+      let a: [(some P & Q) -> Int of Int]
+      let a: [~P of Int]
+      let a: [(Int, String) of Int]
+      let a: [G<T> of Int]
+      let a: [[3 of Int] of Int]
+      let a: [[Int] of Int]
+      let a: [_ of Int]
+      let a: [_? of Int]
+      let a: [_?of Int]
+      let a: [_! of Int]
+      let a: [_!of Int]
+      let a: [Int?of Int]
+
+      """
+
+    let expected =
+      """
+      let a: [3 of Int]
+      let a: [[3 of Int]]
+      let a: [[Int of 3]]
+      let a: [_ of Int]
+      let a: [Int of Int]
+      let a: [@escaping () -> Int of Int]
+      let a: [Int.Type of Int]
+      let a: [sending P & Q of Int]
+      let a: [(some P & Q) -> Int of Int]
+      let a: [~P of Int]
+      let a: [(Int, String) of Int]
+      let a: [G<T> of Int]
+      let a: [[3 of Int] of Int]
+      let a: [[Int] of Int]
+      let a: [_ of Int]
+      let a: [_? of Int]
+      let a: [_? of Int]
+      let a: [_! of Int]
+      let a: [_! of Int]
+      let a: [Int? of Int]
+
+      """
+
+    assertPrettyPrintEqual(input: input, expected: expected, linelength: 40)
+  }
 }