Rollup merge of #71544 - cuviper:filter_map_next, r=Mark-Simulacrum

Replace filter_map().next() calls with find_map()

These are semantically the same, but `find_map()` is more concise.

1 files changed, 4 insertions, 9 deletions

diff --git a/src/libstd/io/buffered.rs b/src/libstd/io/buffered.rs
index 8862226adbb..16ca539b3c1 100644
--- a/src/libstd/io/buffered.rs
+++ b/src/libstd/io/buffered.rs
@@ -1043,15 +1043,10 @@ impl<W: Write> Write for LineWriter<W> {
         }
 
         // Find the last newline, and failing that write the whole buffer
-        let last_newline = bufs
-            .iter()
-            .enumerate()
-            .rev()
-            .filter_map(|(i, buf)| {
-                let pos = memchr::memrchr(b'\n', buf)?;
-                Some((i, pos))
-            })
-            .next();
+        let last_newline = bufs.iter().enumerate().rev().find_map(|(i, buf)| {
+            let pos = memchr::memrchr(b'\n', buf)?;
+            Some((i, pos))
+        });
         let (i, j) = match last_newline {
             Some(pair) => pair,
             None => return self.inner.write_vectored(bufs),