diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/src/main.rs
index d5b1692..47fedc5 100755
--- a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/src/main.rs
+++ b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/src/main.rs
@@ -6,8 +6,8 @@ struct Rectangle {
 
 // ANCHOR: here
 impl Rectangle {
-    fn square(size: u32) -> Rectangle {
-        Rectangle {
+    fn square(size: u32) -> Self {
+        Self {
             width: size,
             height: size,
         }
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/CACHEDIR.TAG b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/CACHEDIR.TAG
new file mode 100644
index 0000000..20d7c31
--- /dev/null
+++ b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/CACHEDIR.TAG
@@ -0,0 +1,3 @@
+Signature: 8a477f597d28d172789f06886806bc55
+# This file is a cache directory tag created by cargo.
+# For information about cache directory tags see https://bford.info/cachedir/
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/CACHEDIR.TAG b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/CACHEDIR.TAG
new file mode 100644
index 0000000..20d7c31
--- /dev/null
+++ b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/CACHEDIR.TAG
@@ -0,0 +1,3 @@
+Signature: 8a477f597d28d172789f06886806bc55
+# This file is a cache directory tag created by cargo.
+# For information about cache directory tags see https://bford.info/cachedir/
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/debug/.cargo-lock b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/debug/.cargo-lock
new file mode 100644
index 0000000..e69de29
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/debug/.fingerprint/rectangles-6066a8348ac7f40b/invoked.timestamp b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/debug/.fingerprint/rectangles-6066a8348ac7f40b/invoked.timestamp
new file mode 100644
index 0000000..e00328d
--- /dev/null
+++ b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/debug/.fingerprint/rectangles-6066a8348ac7f40b/invoked.timestamp
@@ -0,0 +1 @@
+This file has an mtime of when this was started.
\ No newline at end of file
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/debug/.fingerprint/rectangles-937cd89110303d07/invoked.timestamp b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/debug/.fingerprint/rectangles-937cd89110303d07/invoked.timestamp
new file mode 100644
index 0000000..e00328d
--- /dev/null
+++ b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/debug/.fingerprint/rectangles-937cd89110303d07/invoked.timestamp
@@ -0,0 +1 @@
+This file has an mtime of when this was started.
\ No newline at end of file
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/debug/incremental/rectangles-2as79s7g9rucu/s-gcqq22m2rv-kx4l9d.lock b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/target/rls/debug/incremental/rectangles-2as79s7g9rucu/s-gcqq22m2rv-kx4l9d.lock
new file mode 100644
index 0000000..e69de29