diff --git a/src/2/README.md b/src/2/README.md
index f6c6002a..4c64326e 100644
--- a/src/2/README.md
+++ b/src/2/README.md
@@ -15,12 +15,12 @@
 <div id="Source" class="maintab tabcontent active">
 
 <div class="tab">
-<button class="subtab tablinks file-source file-modified active" onclick="switchSubTab(event, 'Cargo.toml')" data-id="Cargo.toml">Cargo.toml</button>
+<button class="subtab tablinks file-source file-modified active" onclick="switchSubTab(event, 'src/lib.rs')" data-id="src/lib.rs">src/lib.rs</button>
 </div>
-<div id="source/Cargo.toml" class="subtab tabcontent active" data-id="Cargo.toml">
+<div id="source/src/lib.rs" class="subtab tabcontent active" data-id="src/lib.rs">
 
-```toml
-{{#include ./source/Cargo.toml}}
+```rust
+{{#include ./source/src/lib.rs}}
 ```
 
 </div>
diff --git a/src/2/source/Cargo.toml b/src/2/source/Cargo.toml
index a79e5621..0c9b8b8d 100644
--- a/src/2/source/Cargo.toml
+++ b/src/2/source/Cargo.toml
@@ -14,7 +14,6 @@ targets = ["x86_64-unknown-linux-gnu"]
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.6.12", default-features = false, features = ["derive"] }
 scale-info = { version = "2.11.1", default-features = false, features = ["derive"] }
-# 🚧 TODO 🚧: Learn about the Polkadot SDK and FRAME.
 frame = { package = "polkadot-sdk-frame", version = "0.6.0", default-features = false, features = ["experimental", "runtime"] }
 
 [features]
diff --git a/src/2/source/changes.diff b/src/2/source/changes.diff
index 32ea63d2..fb1b5c4c 100644
--- a/src/2/source/changes.diff
+++ b/src/2/source/changes.diff
@@ -1,12 +1,12 @@
-diff --git a/Cargo.toml b/Cargo.toml
-index 0c9b8b8..a79e562 100644
---- a/Cargo.toml
-+++ b/Cargo.toml
-@@ -14,6 +14,7 @@ targets = ["x86_64-unknown-linux-gnu"]
- [dependencies]
- codec = { package = "parity-scale-codec", version = "3.6.12", default-features = false, features = ["derive"] }
- scale-info = { version = "2.11.1", default-features = false, features = ["derive"] }
-+# 🚧 TODO 🚧: Learn about the Polkadot SDK and FRAME.
- frame = { package = "polkadot-sdk-frame", version = "0.6.0", default-features = false, features = ["experimental", "runtime"] }
+diff --git a/src/lib.rs b/src/lib.rs
+index 7b6c6a2..0f7bcee 100644
+--- a/src/lib.rs
++++ b/src/lib.rs
+@@ -2,6 +2,7 @@
+ 
+ mod impls;
+ 
++/* 🚧 TODO 🚧: Learn about the Polkadot SDK and FRAME. */
+ use frame::prelude::*;
+ pub use pallet::*;
  
- [features]
diff --git a/src/2/source/src/lib.rs b/src/2/source/src/lib.rs
index 7b6c6a21..0f7bcee9 100644
--- a/src/2/source/src/lib.rs
+++ b/src/2/source/src/lib.rs
@@ -2,6 +2,7 @@
 
 mod impls;
 
+/* 🚧 TODO 🚧: Learn about the Polkadot SDK and FRAME. */
 use frame::prelude::*;
 pub use pallet::*;
 
diff --git a/src/3/README.md b/src/3/README.md
index 623e6b1b..4c64326e 100644
--- a/src/3/README.md
+++ b/src/3/README.md
@@ -15,18 +15,9 @@
 <div id="Source" class="maintab tabcontent active">
 
 <div class="tab">
-<button class="subtab tablinks file-source file-modified active" onclick="switchSubTab(event, 'Cargo.toml')" data-id="Cargo.toml">Cargo.toml</button>
-<button class="subtab tablinks file-source file-modified" onclick="switchSubTab(event, 'src/lib.rs')" data-id="src/lib.rs">src/lib.rs</button>
+<button class="subtab tablinks file-source file-modified active" onclick="switchSubTab(event, 'src/lib.rs')" data-id="src/lib.rs">src/lib.rs</button>
 </div>
-<div id="source/Cargo.toml" class="subtab tabcontent active" data-id="Cargo.toml">
-
-```toml
-{{#include ./source/Cargo.toml}}
-```
-
-</div>
-
-<div id="source/src/lib.rs" class="subtab tabcontent" data-id="src/lib.rs">
+<div id="source/src/lib.rs" class="subtab tabcontent active" data-id="src/lib.rs">
 
 ```rust
 {{#include ./source/src/lib.rs}}
diff --git a/src/3/source/changes.diff b/src/3/source/changes.diff
index f3cf6796..7e1a3ef1 100644
--- a/src/3/source/changes.diff
+++ b/src/3/source/changes.diff
@@ -1,20 +1,12 @@
-diff --git a/Cargo.toml b/Cargo.toml
-index a79e562..0c9b8b8 100644
---- a/Cargo.toml
-+++ b/Cargo.toml
-@@ -14,7 +14,6 @@ targets = ["x86_64-unknown-linux-gnu"]
- [dependencies]
- codec = { package = "parity-scale-codec", version = "3.6.12", default-features = false, features = ["derive"] }
- scale-info = { version = "2.11.1", default-features = false, features = ["derive"] }
--# 🚧 TODO 🚧: Learn about the Polkadot SDK and FRAME.
- frame = { package = "polkadot-sdk-frame", version = "0.6.0", default-features = false, features = ["experimental", "runtime"] }
- 
- [features]
 diff --git a/src/lib.rs b/src/lib.rs
-index 7b6c6a2..8aa7c5b 100644
+index 0f7bcee..8aa7c5b 100644
 --- a/src/lib.rs
 +++ b/src/lib.rs
-@@ -5,6 +5,7 @@ mod impls;
+@@ -2,10 +2,10 @@
+ 
+ mod impls;
+ 
+-/* 🚧 TODO 🚧: Learn about the Polkadot SDK and FRAME. */
  use frame::prelude::*;
  pub use pallet::*;