Fix formatting

library/swift/HeadersBuilder.swift

@@ -38,7 +38,7 @@ public class HeadersBuilder: NSObject {
 
   func headers() -> [String: [String]] {
     return Dictionary(uniqueKeysWithValues: self._headers.map { _, value in
-        return (value.key, value.values) 
+        return (value.key, value.values)
     })
   }
 
@@ -122,7 +122,7 @@ public class HeadersBuilder: NSObject {
     for (name, values) in headers {
       let lowercasedName = name.lowercased()
       /// Dictionaries in Swift are unordered collections. We process headers with keys
-      /// that are the same when lowercased in an alphabetical order to avoid a situation 
+      /// that are the same when lowercased in an alphabetical order to avoid a situation
       /// in which the result of the initialization is underministic i.e., we want
       /// "[A: ["1"]", "a: ["2"]]" headers to be always converted to ["A": ["1", "2"]] and
       /// never to "a": ["2", "1"].

test/swift/HeadersBuilderTests.swift

@@ -56,14 +56,14 @@ final class HeadersBuilderTests: XCTestCase {
     let headers = HeadersBuilder(headers: [:])
     headers.set(name: "foo", value: ["123"])
     headers.set(name: "fOo", value: ["abc"])
-    XCTAssertEqual(["fOo": ["abc"]], headers.headers()) 
+    XCTAssertEqual(["fOo": ["abc"]], headers.headers())
   }
 
   func testRemovingHeaderIsCaseInsensitive() {
     let headers = HeadersBuilder(headers: [:])
     headers.set(name: "foo", value: ["123"])
     headers.remove(name: "fOo")
-    XCTAssertEqual([:], headers.headers()) 
+    XCTAssertEqual([:], headers.headers())
   }
 
   func testRestrictedHeadersAreNotSettable() {