allow space between Defaults@ and hostname list

Author: squell

src/sudoers/ast.rs

@@ -670,6 +670,7 @@ fn get_directive<'a>(
                     // Backtrack and start parsing following the '@' sign
                     *stream = begin_state;
                     stream.advance(DEFAULTS_LEN + 1);
+                    skip_trailing_whitespace(stream)?;
 
                     ConfigScope::Host(expect_nonterminal(stream)?)
                 } else if is_syntax(':', stream)? {

src/sudoers/basic_parser.rs

@@ -144,7 +144,7 @@ impl Parse for Comment {
     }
 }
 
-fn skip_trailing_whitespace(stream: &mut CharStream) -> Parsed<()> {
+pub fn skip_trailing_whitespace(stream: &mut CharStream) -> Parsed<()> {
     TrailingWhitespace::parse(stream)?;
     make(())
 }