diff --git a/src/fs/copy.rs b/src/fs/copy.rs
index f817d6a..bb3316e 100644
--- a/src/fs/copy.rs
+++ b/src/fs/copy.rs
@@ -32,7 +32,7 @@ use crate::task::blocking;
 /// #
 /// use async_std::fs;
 ///
-/// let bytes_copied = fs::copy("foo.txt", "bar.txt").await?;
+/// let bytes_copied = fs::copy("a.txt", "b.txt").await?;
 /// #
 /// # Ok(()) }) }
 /// ```
diff --git a/src/fs/file.rs b/src/fs/file.rs
index d84f098..6f6b898 100644
--- a/src/fs/file.rs
+++ b/src/fs/file.rs
@@ -39,7 +39,7 @@ use crate::task::{blocking, Context, Poll};
 /// use async_std::fs::File;
 /// use async_std::prelude::*;
 ///
-/// let mut file = File::create("foo.txt").await?;
+/// let mut file = File::create("a.txt").await?;
 /// file.write_all(b"Hello, world!").await?;
 /// #
 /// # Ok(()) }) }
@@ -54,7 +54,7 @@ use crate::task::{blocking, Context, Poll};
 /// use async_std::fs::File;
 /// use async_std::prelude::*;
 ///
-/// let mut file = File::open("foo.txt").await?;
+/// let mut file = File::open("a.txt").await?;
 /// let mut contents = Vec::new();
 /// file.read_to_end(&mut contents).await?;
 /// #
@@ -129,7 +129,7 @@ impl File {
     /// #
     /// use async_std::fs::File;
     ///
-    /// let file = File::open("foo.txt").await?;
+    /// let file = File::open("a.txt").await?;
     /// #
     /// # Ok(()) }) }
     /// ```
@@ -176,7 +176,7 @@ impl File {
     /// #
     /// use async_std::fs::File;
     ///
-    /// let file = File::create("foo.txt").await?;
+    /// let file = File::create("a.txt").await?;
     /// #
     /// # Ok(()) }) }
     /// ```
@@ -224,7 +224,7 @@ impl File {
     /// use async_std::fs::File;
     /// use async_std::prelude::*;
     ///
-    /// let mut file = File::create("foo.txt").await?;
+    /// let mut file = File::create("a.txt").await?;
     /// file.write_all(b"Hello, world!").await?;
     /// file.sync_all().await?;
     /// #
@@ -280,7 +280,7 @@ impl File {
     /// use async_std::fs::File;
     /// use async_std::prelude::*;
     ///
-    /// let mut file = File::create("foo.txt").await?;
+    /// let mut file = File::create("a.txt").await?;
     /// file.write_all(b"Hello, world!").await?;
     /// file.sync_data().await?;
     /// #
@@ -340,7 +340,7 @@ impl File {
     /// use async_std::fs::File;
     /// use async_std::prelude::*;
     ///
-    /// let mut file = File::create("foo.txt").await?;
+    /// let mut file = File::create("a.txt").await?;
     /// file.set_len(10).await?;
     /// #
     /// # Ok(()) }) }
@@ -387,7 +387,7 @@ impl File {
     /// #
     /// use async_std::fs::File;
     ///
-    /// let file = File::open("foo.txt").await?;
+    /// let file = File::open("a.txt").await?;
     /// let metadata = file.metadata().await?;
     /// #
     /// # Ok(()) }) }
@@ -440,7 +440,7 @@ impl File {
     /// use async_std::fs::File;
     /// use async_std::prelude::*;
     ///
-    /// let mut file = File::create("foo.txt").await?;
+    /// let mut file = File::create("a.txt").await?;
     /// let mut perms = file.metadata().await?.permissions();
     /// perms.set_readonly(true);
     /// file.set_permissions(perms).await?;
diff --git a/src/fs/metadata.rs b/src/fs/metadata.rs
index 066be3c..67ab620 100644
--- a/src/fs/metadata.rs
+++ b/src/fs/metadata.rs
@@ -27,7 +27,7 @@ use crate::task::blocking;
 /// #
 /// use async_std::fs;
 ///
-/// let perm = fs::metadata("foo.txt").await?.permissions();
+/// let perm = fs::metadata("a.txt").await?.permissions();
 /// #
 /// # Ok(()) }) }
 /// ```
diff --git a/src/fs/mod.rs b/src/fs/mod.rs
index 1c7f3fe..28b55b8 100644
--- a/src/fs/mod.rs
+++ b/src/fs/mod.rs
@@ -15,7 +15,7 @@
 //! use async_std::fs::File;
 //! use async_std::prelude::*;
 //!
-//! let mut file = File::create("foo.txt").await?;
+//! let mut file = File::create("a.txt").await?;
 //! file.write_all(b"Hello, world!").await?;
 //! #
 //! # Ok(()) }) }
diff --git a/src/fs/open_options.rs b/src/fs/open_options.rs
index 1ac3dbe..72ce24c 100644
--- a/src/fs/open_options.rs
+++ b/src/fs/open_options.rs
@@ -39,7 +39,7 @@ use crate::task::blocking;
 ///
 /// let file = OpenOptions::new()
 ///     .read(true)
-///     .open("foo.txt")
+///     .open("a.txt")
 ///     .await?;
 /// #
 /// # Ok(()) }) }
@@ -57,7 +57,7 @@ use crate::task::blocking;
 ///     .read(true)
 ///     .write(true)
 ///     .create(true)
-///     .open("foo.txt")
+///     .open("a.txt")
 ///     .await?;
 /// #
 /// # Ok(()) }) }
@@ -80,7 +80,7 @@ impl OpenOptions {
     ///
     /// let file = OpenOptions::new()
     ///     .read(true)
-    ///     .open("foo.txt")
+    ///     .open("a.txt")
     ///     .await?;
     /// #
     /// # Ok(()) }) }
@@ -103,7 +103,7 @@ impl OpenOptions {
     ///
     /// let file = OpenOptions::new()
     ///     .read(true)
-    ///     .open("foo.txt")
+    ///     .open("a.txt")
     ///     .await?;
     /// #
     /// # Ok(()) }) }
@@ -130,7 +130,7 @@ impl OpenOptions {
     ///
     /// let file = OpenOptions::new()
     ///     .write(true)
-    ///     .open("foo.txt")
+    ///     .open("a.txt")
     ///     .await?;
     /// #
     /// # Ok(()) }) }
@@ -176,7 +176,7 @@ impl OpenOptions {
     ///
     /// let file = OpenOptions::new()
     ///     .append(true)
-    ///     .open("foo.txt")
+    ///     .open("a.txt")
     ///     .await?;
     /// #
     /// # Ok(()) }) }
@@ -204,7 +204,7 @@ impl OpenOptions {
     /// let file = OpenOptions::new()
     ///     .write(true)
     ///     .truncate(true)
-    ///     .open("foo.txt")
+    ///     .open("a.txt")
     ///     .await?;
     /// #
     /// # Ok(()) }) }
@@ -234,7 +234,7 @@ impl OpenOptions {
     /// let file = OpenOptions::new()
     ///     .write(true)
     ///     .create(true)
-    ///     .open("foo.txt")
+    ///     .open("a.txt")
     ///     .await?;
     /// #
     /// # Ok(()) }) }
@@ -271,7 +271,7 @@ impl OpenOptions {
     /// let file = OpenOptions::new()
     ///     .write(true)
     ///     .create_new(true)
-    ///     .open("foo.txt")
+    ///     .open("a.txt")
     ///     .await?;
     /// #
     /// # Ok(()) }) }
@@ -321,7 +321,7 @@ impl OpenOptions {
     /// #
     /// use async_std::fs::OpenOptions;
     ///
-    /// let file = OpenOptions::new().open("foo.txt").await?;
+    /// let file = OpenOptions::new().open("a.txt").await?;
     /// #
     /// # Ok(()) }) }
     /// ```
diff --git a/src/fs/read.rs b/src/fs/read.rs
index f7aabe0..ba79d50 100644
--- a/src/fs/read.rs
+++ b/src/fs/read.rs
@@ -29,7 +29,7 @@ use crate::task::blocking;
 /// #
 /// use async_std::fs;
 ///
-/// let contents = fs::read("foo.txt").await?;
+/// let contents = fs::read("a.txt").await?;
 /// #
 /// # Ok(()) }) }
 /// ```
diff --git a/src/fs/read_link.rs b/src/fs/read_link.rs
index aa9cbcb..0612b28 100644
--- a/src/fs/read_link.rs
+++ b/src/fs/read_link.rs
@@ -25,7 +25,7 @@ use crate::task::blocking;
 /// #
 /// use async_std::fs;
 ///
-/// let path = fs::read_link("foo.txt").await?;
+/// let path = fs::read_link("a.txt").await?;
 /// #
 /// # Ok(()) }) }
 /// ```
diff --git a/src/fs/read_to_string.rs b/src/fs/read_to_string.rs
index 6bd1a7c..2f771fa 100644
--- a/src/fs/read_to_string.rs
+++ b/src/fs/read_to_string.rs
@@ -24,7 +24,7 @@ use crate::task::blocking;
 /// use async_std::fs::read_to_string;
 ///
 /// # futures::executor::block_on(async {
-/// let contents = read_to_string("foo.txt").await?;
+/// let contents = read_to_string("a.txt").await?;
 /// # std::io::Result::Ok(())
 /// # }).unwrap();
 /// ```
diff --git a/src/fs/remove_file.rs b/src/fs/remove_file.rs
index 4463250..4e691a2 100644
--- a/src/fs/remove_file.rs
+++ b/src/fs/remove_file.rs
@@ -25,7 +25,7 @@ use crate::task::blocking;
 /// #
 /// use async_std::fs;
 ///
-/// fs::remove_file("foo.txt").await?;
+/// fs::remove_file("a.txt").await?;
 /// #
 /// # Ok(()) }) }
 /// ```
diff --git a/src/fs/set_permissions.rs b/src/fs/set_permissions.rs
index ed61d19..e5e1c2a 100644
--- a/src/fs/set_permissions.rs
+++ b/src/fs/set_permissions.rs
@@ -25,10 +25,10 @@ use crate::task::blocking;
 /// #
 /// use async_std::fs;
 ///
-/// let mut perm = fs::metadata("foo.txt").await?.permissions();
+/// let mut perm = fs::metadata("a.txt").await?.permissions();
 /// perm.set_readonly(true);
 ///
-/// fs::set_permissions("foo.txt", perm).await?;
+/// fs::set_permissions("a.txt", perm).await?;
 /// #
 /// # Ok(()) }) }
 /// ```
diff --git a/src/fs/symlink_metadata.rs b/src/fs/symlink_metadata.rs
index 43d8ea2..1c34bb9 100644
--- a/src/fs/symlink_metadata.rs
+++ b/src/fs/symlink_metadata.rs
@@ -25,7 +25,7 @@ use crate::task::blocking;
 /// #
 /// use async_std::fs;
 ///
-/// let perm = fs::symlink_metadata("foo.txt").await?.permissions();
+/// let perm = fs::symlink_metadata("a.txt").await?.permissions();
 /// #
 /// # Ok(()) }) }
 /// ```
diff --git a/src/fs/write.rs b/src/fs/write.rs
index 693f95a..83a1938 100644
--- a/src/fs/write.rs
+++ b/src/fs/write.rs
@@ -27,7 +27,7 @@ use crate::task::blocking;
 /// #
 /// use async_std::fs;
 ///
-/// fs::write("foo.txt", b"Lorem ipsum").await?;
+/// fs::write("a.txt", b"Lorem ipsum").await?;
 /// #
 /// # Ok(()) }) }
 /// ```
diff --git a/src/lib.rs b/src/lib.rs
index 387bdf2..ceb58a9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-//! Asynchronous standard library.
+//! Async version of the Rust standard library.
 //!
 //! This crate is an async version of [`std`].
 //!
diff --git a/src/task/local.rs b/src/task/local.rs
index 01062c3..f853a83 100644
--- a/src/task/local.rs
+++ b/src/task/local.rs
@@ -94,11 +94,11 @@ impl<T: Send + 'static> LocalKey<T> {
     /// use std::cell::Cell;
     ///
     /// task_local! {
-    ///     static FOO: Cell<u32> = Cell::new(5);
+    ///     static NUMBER: Cell<u32> = Cell::new(5);
     /// }
     ///
     /// task::block_on(async {
-    ///     let v = FOO.with(|c| c.get());
+    ///     let v = NUMBER.with(|c| c.get());
     ///     assert_eq!(v, 5);
     /// });
     /// ```
diff --git a/tests/block_on.rs b/tests/block_on.rs
index baa1240..7c6a316 100644
--- a/tests/block_on.rs
+++ b/tests/block_on.rs
@@ -9,10 +9,10 @@ fn smoke() {
 }
 
 #[test]
-#[should_panic = "foo"]
+#[should_panic = "boom"]
 fn panic() {
     task::block_on(async {
         // This panic should get propagated into the parent thread.
-        panic!("foo");
+        panic!("boom");
     });
 }