bstr: just use StdinLock

There's no need to wrap a StdinLock in a BufReader because StdinLock
already implements BufRead.

I had originally written a lot of this code using Stdin instead of
StdinLock, where Stdin does not implement BufRead.

But StdinLock is the right thing to use here.

Also, it is so much easier to use StdinLock now than it used to be. You
used to have to do something like this:

  let stdin = io::stdin();
  let stdin = stdin.lock();

Otherwise the lifetimes wouldn't work out. Turns out that we recently
made a change to Stdin::lock such that it returns a StdinLock<'static>
instead of a lifetime bound to Stdin. Which is so much nicer.

Ref: rust-lang/rust#93965

content/post/bstr.md

@@ -289,7 +289,7 @@ use bstr::{io::BufReadExt, ByteSlice};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let needle = "Affiliate";
-    for result in std::io::BufReader::new(std::io::stdin()).byte_lines() {
+    for result in std::io::stdin().lock().byte_lines() {
         let line = result?;
         // '[T]::contains' is already defined in std and is not
         // substring search, so bstr defines it under a new name and
@@ -427,7 +427,7 @@ type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
 
 fn main() -> Result<()> {
     let shiftor = ShiftOr::new("Sushi")?;
-    let mut rdr = std::io::BufReader::new(std::io::stdin().lock());
+    let mut rdr = std::io::stdin().lock();
     let mut line = String::new();
     loop {
         line.clear();
@@ -523,7 +523,7 @@ type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
 
 fn main() -> Result<()> {
     let shiftor = ShiftOr::new("Sushi")?;
-    let mut rdr = std::io::BufReader::new(std::io::stdin().lock());
+    let mut rdr = std::io::stdin().lock();
     let mut line = Vec::new();
     loop {
         line.clear();
@@ -587,7 +587,7 @@ type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
 
 fn main() -> Result<()> {
     let needle = "Sushi";
-    let mut rdr = std::io::BufReader::new(std::io::stdin().lock());
+    let mut rdr = std::io::stdin().lock();
     let mut line = String::new();
     loop {
         line.clear();
@@ -614,7 +614,7 @@ type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
 
 fn main() -> Result<()> {
     let needle = "Sushi";
-    let mut rdr = std::io::BufReader::new(std::io::stdin().lock());
+    let mut rdr = std::io::stdin().lock();
     let mut line = Vec::new();
     loop {
         line.clear();
@@ -677,7 +677,7 @@ type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
 
 fn main() -> Result<()> {
     let searcher = bstr::Finder::new("Sushi");
-    let mut rdr = std::io::BufReader::new(std::io::stdin().lock());
+    let mut rdr = std::io::stdin().lock();
     let mut line = Vec::new();
     loop {
         line.clear();
@@ -729,7 +729,7 @@ type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
 
 fn main() -> Result<()> {
     let searcher = bstr::Finder::new("Sushi");
-    let mut rdr = std::io::BufReader::new(std::io::stdin().lock());
+    let mut rdr = std::io::stdin().lock();
     rdr.for_byte_line_with_terminator(|line| {
         if searcher.find(line).is_some() {
             std::io::stdout().write_all(line.as_bytes())?;
@@ -917,7 +917,7 @@ use bstr::{io::BufReadExt, ByteSlice};
 fn main() -> anyhow::Result<()> {
     let config = Config::parse(std::env::args_os())?;
     let (mut chars, mut words, mut lines) = (0, 0, 0);
-    let mut bufrdr = io::BufReader::new(io::stdin().lock());
+    let mut bufrdr = io::stdin().lock();
     bufrdr.for_byte_line_with_terminator(|line| {
         lines += 1;
         if config.chars {
@@ -1138,7 +1138,7 @@ use bstr::io::BufReadExt;
 fn main() -> anyhow::Result<()> {
     let config = Config::parse(std::env::args_os())?;
     let searcher = bstr::Finder::new(&config.needle);
-    let mut bufrdr = io::BufReader::new(io::stdin().lock());
+    let mut bufrdr = io::stdin().lock();
     let mut wtr = termcolor::StandardStream::stdout(ColorChoice::Auto);
     let mut lineno = 0;
     bufrdr.for_byte_line(|line| {
@@ -1239,7 +1239,7 @@ use termcolor::{ColorChoice, WriteColor};
 ///   badutf8 < stdin
 ///   foo ... | badutf8
 fn main() -> anyhow::Result<()> {
-    let mut bufrdr = io::BufReader::new(io::stdin().lock());
+    let mut bufrdr = io::stdin().lock();
     let mut wtr = termcolor::StandardStream::stdout(ColorChoice::Auto);
     let mut lineno = 0;
     bufrdr.for_byte_line(|mut line| {