test: Fix help header format

- correct the format of the help header to align with the expected output

Author: gortavoher

tests/builder/subcommands.rs

@@ -639,18 +639,18 @@ fn duplicate_subcommand_alias() {
 #[test]
 fn test_help_header() {
     static VISIBLE_ALIAS_HELP: &str = "\
-    Usage: clap-test [COMMAND]
-    
-    Commands:
-    help  Print this message or the help of the given subcommand(s)
-    
-    Test commands:
-    test  Some help
-    
-    Options:
-    -h, --help     Print help
-    -V, --version  Print version
-    ";
+Usage: clap-test [COMMAND]
+
+Commands:
+  help  Print this message or the help of the given subcommand(s)
+
+Test commands:
+  test  Some help
+
+Options:
+  -h, --help     Print help
+  -V, --version  Print version
+";
 
     let cmd = Command::new("clap-test")
     .version("2.6")