io: fix doc for `write_i8` to use signed integers
Fixes:
@@ -406,7 +406,7 @@ cfg_io_util! {
/// ```
fn write_u8(&mut self, n: u8) -> WriteU8;
- /// Writes an unsigned 8-bit integer to the underlying writer.
+ /// Writes a signed 8-bit integer to the underlying writer.
///
/// Equivalent to:
///
@@ -425,7 +425,7 @@ cfg_io_util! {
///
/// # Examples
///
- /// Write unsigned 8 bit integers to a `AsyncWrite`:
+ /// Write signed 8 bit integers to a `AsyncWrite`:
///
/// ```rust
/// use tokio::io::{self, AsyncWriteExt};
@@ -434,10 +434,10 @@ cfg_io_util! {
/// async fn main() -> io::Result<()> {
/// let mut writer = Vec::new();
///
- /// writer.write_u8(2).await?;
- /// writer.write_u8(5).await?;
+ /// writer.write_i8(-2).await?;
+ /// writer.write_i8(126).await?;
///
- /// assert_eq!(writer, b"\x02\x05");
+ /// assert_eq!(writer, b"\xFE\x7E");
/// Ok(())
/// }
/// ```
