Merge commit '371120bdbf' into clippyup

src/tools/clippy/tests/ui/string_lit_as_bytes.fixed

@@ -1,8 +1,18 @@
 //@run-rustfix
+//@aux-build:macro_rules.rs
 
 #![allow(dead_code, unused_variables)]
 #![warn(clippy::string_lit_as_bytes)]
 
+#[macro_use]
+extern crate macro_rules;
+
+macro_rules! b {
+    ($b:literal) => {
+        const B: &[u8] = b"warning";
+    };
+}
+
 fn str_lit_as_bytes() {
     let bs = b"hello there";
 
@@ -11,6 +21,10 @@ fn str_lit_as_bytes() {
     let bs = b"lit to string".to_vec();
     let bs = b"lit to owned".to_vec();
 
+    b!("warning");
+
+    string_lit_as_bytes!("no warning");
+
     // no warning, because these cannot be written as byte string literals:
     let ubs = "☃".as_bytes();
     let ubs = "hello there! this is a very long string".as_bytes();