rollup merge of #21830: japaric/for-cleanup

Conflicts:
	src/librustc/metadata/filesearch.rs
	src/librustc_back/target/mod.rs
	src/libstd/os.rs
	src/libstd/sys/windows/os.rs
	src/libsyntax/ext/tt/macro_parser.rs
	src/libsyntax/print/pprust.rs
	src/test/compile-fail/issue-2149.rs

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libsyntax/parse/lexer/mod.rs b/src/libsyntax/parse/lexer/mod.rs
index 65051ff8360..e6da47304ce 100644
--- a/src/libsyntax/parse/lexer/mod.rs
+++ b/src/libsyntax/parse/lexer/mod.rs
@@ -1526,7 +1526,7 @@ mod test {
     // check that the given reader produces the desired stream
     // of tokens (stop checking after exhausting the expected vec)
     fn check_tokenization (mut string_reader: StringReader, expected: Vec<token::Token> ) {
-        for expected_tok in expected.iter() {
+        for expected_tok in &expected {
             assert_eq!(&string_reader.next_token().tok, expected_tok);
         }
     }