Merge pull request #966 from ikesyo/address-some-warnings

Author: swift-ci

Foundation/NSProcessInfo.swift

@@ -92,7 +92,7 @@ open class ProcessInfo: NSObject {
             return OperatingSystemVersion(majorVersion: fallbackMajor, minorVersion: fallbackMinor, patchVersion: fallbackPatch)
         }
 
-        let versionComponents = productVersion._swiftObject.characters.split(separator: ".").flatMap(String.init).flatMap({ Int($0) })
+        let versionComponents = productVersion._swiftObject.characters.split(separator: ".").map(String.init).flatMap({ Int($0) })
         let majorVersion = versionComponents.dropFirst(0).first ?? fallbackMajor
         let minorVersion = versionComponents.dropFirst(1).first ?? fallbackMinor
         let patchVersion = versionComponents.dropFirst(2).first ?? fallbackPatch

TestFoundation/TestNSHTTPCookieStorage.swift

@@ -239,7 +239,7 @@ class TestNSHTTPCookieStorage: XCTestCase {
         //Test by setting the environmental variable
         let bundle = Bundle.main
         let bundlePath = bundle.bundlePath
-        var pathIndex = bundlePath.range(of: "/", options: .backwards)?.lowerBound
+        let pathIndex = bundlePath.range(of: "/", options: .backwards)?.lowerBound
         let task = Process()
         task.launchPath = bundlePath.substring(to: pathIndex!) + "/xdgTestHelper/xdgTestHelper"
         var environment = ProcessInfo.processInfo.environment