nit: fix readme help

CHANGELOG.md

@@ -1,3 +1,5 @@
+## 4.2.1-wip
+
 ## 4.2.0
 
 - Added support for `https`.

README.md

@@ -54,7 +54,7 @@ See the Dart documentation of [SecurityContext.usePrivateKey](https://api.dart.d
 
 ```console
 $ dhttpd --help
---headers=<headers>                  HTTP headers to apply to each response. Can be used multiple times. Format: header=value;header2=value
+    --headers=<headers>                  HTTP headers to apply to each response. Can be used multiple times. Format: header=value;header2=value
     --host=<host>                        The hostname to listen on.
                                          (defaults to "localhost")
 -l, --list-files                         List the files in the directory if no index.html is present.

pubspec.yaml

@@ -1,5 +1,5 @@
 name: dhttpd
-version: 4.2.0
+version: 4.2.1-wip
 
 description: A static HTTP file server for easy local hosting of a directory.
 repository: https://github.com/kevmoo/dhttpd

test/command_test.dart

@@ -26,7 +26,7 @@ Future<void> _versionCheck() async {
 
 Future<void> _readmeCheck(List<String> args) async {
   final process = await _runApp(args);
-  final output = (await process.stdoutStream().join('\n')).trim();
+  final output = (await process.stdoutStream().join('\n')).trimRight();
   await process.shouldExit(0);
 
   final readme = File('README.md');
@@ -43,7 +43,7 @@ $output
 
   expect(expected, r'''```console
 $ dhttpd --help
---headers=<headers>                  HTTP headers to apply to each response. Can be used multiple times. Format: header=value;header2=value
+    --headers=<headers>                  HTTP headers to apply to each response. Can be used multiple times. Format: header=value;header2=value
     --host=<host>                        The hostname to listen on.
                                          (defaults to "localhost")
 -l, --list-files                         List the files in the directory if no index.html is present.