Fix two minor clippy issues

Author: A0lson

multiboot2-header/src/builder/information_request.rs

@@ -21,7 +21,7 @@ pub struct InformationRequestHeaderTagBuilder {
 #[cfg(feature = "builder")]
 impl InformationRequestHeaderTagBuilder {
     /// New builder.
-    pub fn new(flag: HeaderTagFlag) -> Self {
+    pub const fn new(flag: HeaderTagFlag) -> Self {
         Self {
             irs: BTreeSet::new(),
             flag,

multiboot2-header/src/header.rs

@@ -47,8 +47,7 @@ impl<'a> Multiboot2Header<'a> {
         assert_eq!(
             reference.header_magic(),
             MULTIBOOT2_HEADER_MAGIC,
-            "The Multiboot2 header must contain the MULTIBOOT2_HEADER_MAGIC={:x}",
-            MULTIBOOT2_HEADER_MAGIC
+            "The Multiboot2 header must contain the MULTIBOOT2_HEADER_MAGIC={MULTIBOOT2_HEADER_MAGIC:x}"
         );
         assert!(
             reference.verify_checksum(),