Fix typos.

src/buf/buf.rs

@@ -16,7 +16,7 @@ macro_rules! buf_get_impl {
             }
         };
         if let Some(ret) = ret {
-             // if the direct convertion was possible, advance and return
+             // if the direct conversion was possible, advance and return
             $this.advance($size);
             return ret;
         } else {
@@ -792,7 +792,7 @@ pub trait Buf {
     /// Transforms a `Buf` into a concrete buffer.
     ///
     /// `collect()` can operate on any value that implements `Buf`, and turn it
-    /// into the relevent concrete buffer type.
+    /// into the relevant concrete buffer type.
     ///
     /// # Examples
     ///
@@ -997,6 +997,6 @@ impl Buf for Option<[u8; 1]> {
     }
 }
 
-// The existance of this function makes the compiler catch if the Buf
+// The existence of this function makes the compiler catch if the Buf
 // trait is "object-safe" or not.
 fn _assert_trait_object(_b: &dyn Buf) {}

src/buf/buf_mut.rs

@@ -942,7 +942,7 @@ pub trait BufMut {
     ///     // Adapt reference to `std::io::Write`.
     ///     let mut writer = reference.writer();
     ///
-    ///     // Use the buffer as a writter
+    ///     // Use the buffer as a writer
     ///     io::Write::write(&mut writer, &b"hello world"[..]).unwrap();
     /// } // drop our &mut reference so that we can use `buf` again
     ///
@@ -1069,6 +1069,6 @@ impl BufMut for Vec<u8> {
     }
 }
 
-// The existance of this function makes the compiler catch if the BufMut
+// The existence of this function makes the compiler catch if the BufMut
 // trait is "object-safe" or not.
 fn _assert_trait_object(_b: &dyn BufMut) {}

src/buf/chain.rs

@@ -5,7 +5,7 @@ use std::io::{IoSlice, IoSliceMut};
 /// A `Chain` sequences two buffers.
 ///
 /// `Chain` is an adapter that links two underlying buffers and provides a
-/// continous view across both buffers. It is able to sequence either immutable
+/// continuous view across both buffers. It is able to sequence either immutable
 /// buffers ([`Buf`] values) or mutable buffers ([`BufMut`] values).
 ///
 /// This struct is generally created by calling [`Buf::chain`]. Please see that