Use format! instead of write_fmt/format_args

Author: PluieElectrique

html5ever/src/util/str.rs

@@ -10,13 +10,9 @@
 use std::fmt;
 
 pub fn to_escaped_string<T: fmt::Debug>(x: &T) -> String {
-    use std::fmt::Write;
-
     // FIXME: don't allocate twice
-    let mut buf = String::new();
-    let _ = buf.write_fmt(format_args!("{:?}", x));
-    buf.shrink_to_fit();
-    buf.chars().flat_map(|c| c.escape_default()).collect()
+    let string = format!("{:?}", x);
+    string.chars().flat_map(|c| c.escape_default()).collect()
 }
 
 /// If `c` is an ASCII letter, return the corresponding lowercase