Add PR number and fix some danger logic

Author: Andrew Cobb

CHANGELOG.md

@@ -25,7 +25,7 @@ All notable changes to this project will be documented in this file. Changes not
 
 ## Changed
 
-- Turn `HttpServer` and `HttpServerIO` into open classes to allow for more customization. (#???) by [@cobbal](https://github.com/cobbal)
+- Turn `HttpServer` and `HttpServerIO` into open classes to allow for more customization. ([#443](https://github.com/httpswift/swifter/pull/443)) by [@cobbal](https://github.com/cobbal)
 - Set the version of the HTTP Server based in the project version in the **Info.plist** for macOS, iOS and tvOS platforms. ([#416](https://github.com/httpswift/swifter/pull/416)) by [@Vkt0r](https://github.com/Vkt0r)
 - Update `HttpParser` so it percent-encodes the URL components before initializing `URLComponents`. ([#423](https://github.com/httpswift/swifter/pull/423)) by [@nejcvivod](https://github.com/nejcvivod)
 - Update `SwifterTestsHttpParser` with a test for parsing bracketed query strings. ([#423](https://github.com/httpswift/swifter/pull/423)) by [@nejcvivod](https://github.com/nejcvivod)

Dangerfile

@@ -26,7 +26,7 @@ swiftlint.config_file = '.swiftlint.yml'
 swiftlint.lint_files
 
 # Warn when new tests are added but the XCTestManifests wasn't updated to run on Linux
-tests_added_or_modified = git.modified_files.grep(/XCode\/Tests/).empty? || git.added_files.grep(/XCode\/Tests/).empty?
+tests_added_or_modified = !git.modified_files.grep(/XCode\/Tests/).empty? || !git.added_files.grep(/XCode\/Tests/).empty?
 xc_manifest_updated = !git.modified_files.grep(/XCode\/Tests\/XCTestManifests.swift/).empty?
 if tests_added_or_modified && !xc_manifest_updated
   warn("It seems like you've added new tests to the library. If that's the case, please update the [XCTestManifests.swift](https://github.com/httpswift/swifter/blob/stable/XCode/Tests/XCTestManifests.swift) file running in your terminal the command `swift test --generate-linuxmain`.")