clippy: fix warnings about useless format call and remove references that would be immediately dereferenced by the compiler.

src/search_buffer.rs

@@ -113,7 +113,7 @@ impl<'a, W: WriteColor> BufferSearcher<'a, W> {
 
     #[inline(never)]
     pub fn run(mut self) -> u64 {
-        let binary_upto = cmp::min(10240, self.buf.len());
+        let binary_upto = cmp::min(10_240, self.buf.len());
         if !self.opts.text && is_binary(&self.buf[..binary_upto], true) {
             return 0;
         }