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remove useless mut from examples #99716

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Merged
merged 1 commit into from
Jul 26, 2022
Merged

remove useless mut from examples #99716

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8 changes: 4 additions & 4 deletions library/std/src/io/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -898,7 +898,7 @@ pub trait Read {
/// use std::fs::File;
///
/// fn main() -> io::Result<()> {
/// let mut f = File::open("foo.txt")?;
/// let f = File::open("foo.txt")?;
///
/// for byte in f.bytes() {
/// println!("{}", byte.unwrap());
Expand Down Expand Up @@ -932,8 +932,8 @@ pub trait Read {
/// use std::fs::File;
///
/// fn main() -> io::Result<()> {
/// let mut f1 = File::open("foo.txt")?;
/// let mut f2 = File::open("bar.txt")?;
/// let f1 = File::open("foo.txt")?;
/// let f2 = File::open("bar.txt")?;
///
/// let mut handle = f1.chain(f2);
/// let mut buffer = String::new();
Expand Down Expand Up @@ -973,7 +973,7 @@ pub trait Read {
/// use std::fs::File;
///
/// fn main() -> io::Result<()> {
/// let mut f = File::open("foo.txt")?;
/// let f = File::open("foo.txt")?;
/// let mut buffer = [0; 5];
///
/// // read at most five bytes
Expand Down