Eliminate itoa::write and itoa::fmt from readme

README.md

@@ -34,32 +34,13 @@ itoa = "0.4"
 
 <br>
 
-## Examples
+## Example
 
 ```rust
-use std::{fmt, io};
-
-fn demo_itoa_write() -> io::Result<()> {
-    // Write to a vector or other io::Write.
-    let mut buf = Vec::new();
-    itoa::write(&mut buf, 128u64)?;
-    println!("{:?}", buf);
-
-    // Write to a stack buffer.
-    let mut bytes = [0u8; 20];
-    let n = itoa::write(&mut bytes[..], 128u64)?;
-    println!("{:?}", &bytes[..n]);
-
-    Ok(())
-}
-
-fn demo_itoa_fmt() -> fmt::Result {
-    // Write to a string.
-    let mut s = String::new();
-    itoa::fmt(&mut s, 128u64)?;
-    println!("{}", s);
-
-    Ok(())
+fn main() {
+    let mut buffer = itoa::Buffer::new();
+    let printed = buffer.format(128u64);
+    assert_eq!(printed, "128");
 }
 ```