diff --git a/tests/snapshots/output/changes,grid,header,numbers.snapshot.txt b/tests/snapshots/output/changes,grid,header,numbers.snapshot.txt
new file mode 100644
index 00000000..b15296ee
--- /dev/null
+++ b/tests/snapshots/output/changes,grid,header,numbers.snapshot.txt
@@ -0,0 +1,25 @@
+───────┬────────────────────────────────────────────────────────────────────────
+       │ File: sample.rs
+───────┼────────────────────────────────────────────────────────────────────────
+   1   │ struct Rectangle {
+   2   │     width: u32,
+   3   │     height: u32,
+   4   │ }
+   5   │ 
+   6 _ │ fn main() {
+   7   │     let rect1 = Rectangle { width: 30, height: 50 };
+   8   │ 
+   9   │     println!(
+  10 ~ │         "The perimeter of the rectangle is {} pixels.",
+  11 ~ │         perimeter(&rect1)
+  12   │     );
+  13   │ }
+  14   │ 
+  15   │ fn area(rectangle: &Rectangle) -> u32 {
+  16   │     rectangle.width * rectangle.height
+  17   │ }
+  18 + │ 
+  19 + │ fn perimeter(rectangle: &Rectangle) -> u32 {
+  20 + │     (rectangle.width + rectangle.height) * 2
+  21 + │ }
+───────┴────────────────────────────────────────────────────────────────────────
diff --git a/tests/snapshots/output/changes,grid,header.snapshot.txt b/tests/snapshots/output/changes,grid,header.snapshot.txt
new file mode 100644
index 00000000..cb53d7a8
--- /dev/null
+++ b/tests/snapshots/output/changes,grid,header.snapshot.txt
@@ -0,0 +1,25 @@
+───────┬────────────────────────────────────────────────────────────────────────
+       │ File: sample.rs
+───────┼────────────────────────────────────────────────────────────────────────
+       │ struct Rectangle {
+       │     width: u32,
+       │     height: u32,
+       │ }
+       │ 
+     _ │ fn main() {
+       │     let rect1 = Rectangle { width: 30, height: 50 };
+       │ 
+       │     println!(
+     ~ │         "The perimeter of the rectangle is {} pixels.",
+     ~ │         perimeter(&rect1)
+       │     );
+       │ }
+       │ 
+       │ fn area(rectangle: &Rectangle) -> u32 {
+       │     rectangle.width * rectangle.height
+       │ }
+     + │ 
+     + │ fn perimeter(rectangle: &Rectangle) -> u32 {
+     + │     (rectangle.width + rectangle.height) * 2
+     + │ }
+───────┴────────────────────────────────────────────────────────────────────────
diff --git a/tests/snapshots/output/changes,grid,numbers.snapshot.txt b/tests/snapshots/output/changes,grid,numbers.snapshot.txt
new file mode 100644
index 00000000..fd078f3a
--- /dev/null
+++ b/tests/snapshots/output/changes,grid,numbers.snapshot.txt
@@ -0,0 +1,22 @@
+   1   │ struct Rectangle {
+   2   │     width: u32,
+   3   │     height: u32,
+   4   │ }
+   5   │ 
+   6 _ │ fn main() {
+   7   │     let rect1 = Rectangle { width: 30, height: 50 };
+   8   │ 
+   9   │     println!(
+  10 ~ │         "The perimeter of the rectangle is {} pixels.",
+  11 ~ │         perimeter(&rect1)
+  12   │     );
+  13   │ }
+  14   │ 
+  15   │ fn area(rectangle: &Rectangle) -> u32 {
+  16   │     rectangle.width * rectangle.height
+  17   │ }
+  18 + │ 
+  19 + │ fn perimeter(rectangle: &Rectangle) -> u32 {
+  20 + │     (rectangle.width + rectangle.height) * 2
+  21 + │ }
+───────┴────────────────────────────────────────────────────────────────────────
diff --git a/tests/snapshots/output/changes,grid.snapshot.txt b/tests/snapshots/output/changes,grid.snapshot.txt
new file mode 100644
index 00000000..ff7ea09d
--- /dev/null
+++ b/tests/snapshots/output/changes,grid.snapshot.txt
@@ -0,0 +1,22 @@
+       │ struct Rectangle {
+       │     width: u32,
+       │     height: u32,
+       │ }
+       │ 
+     _ │ fn main() {
+       │     let rect1 = Rectangle { width: 30, height: 50 };
+       │ 
+       │     println!(
+     ~ │         "The perimeter of the rectangle is {} pixels.",
+     ~ │         perimeter(&rect1)
+       │     );
+       │ }
+       │ 
+       │ fn area(rectangle: &Rectangle) -> u32 {
+       │     rectangle.width * rectangle.height
+       │ }
+     + │ 
+     + │ fn perimeter(rectangle: &Rectangle) -> u32 {
+     + │     (rectangle.width + rectangle.height) * 2
+     + │ }
+───────┴────────────────────────────────────────────────────────────────────────
diff --git a/tests/snapshots/output/changes,header,numbers.snapshot.txt b/tests/snapshots/output/changes,header,numbers.snapshot.txt
new file mode 100644
index 00000000..1b190a19
--- /dev/null
+++ b/tests/snapshots/output/changes,header,numbers.snapshot.txt
@@ -0,0 +1,22 @@
+File: sample.rs
+   1   struct Rectangle {
+   2       width: u32,
+   3       height: u32,
+   4   }
+   5   
+   6 _ fn main() {
+   7       let rect1 = Rectangle { width: 30, height: 50 };
+   8   
+   9       println!(
+  10 ~         "The perimeter of the rectangle is {} pixels.",
+  11 ~         perimeter(&rect1)
+  12       );
+  13   }
+  14   
+  15   fn area(rectangle: &Rectangle) -> u32 {
+  16       rectangle.width * rectangle.height
+  17   }
+  18 + 
+  19 + fn perimeter(rectangle: &Rectangle) -> u32 {
+  20 +     (rectangle.width + rectangle.height) * 2
+  21 + }
diff --git a/tests/snapshots/output/changes,header.snapshot.txt b/tests/snapshots/output/changes,header.snapshot.txt
new file mode 100644
index 00000000..f914c95b
--- /dev/null
+++ b/tests/snapshots/output/changes,header.snapshot.txt
@@ -0,0 +1,22 @@
+File: sample.rs
+  struct Rectangle {
+      width: u32,
+      height: u32,
+  }
+  
+_ fn main() {
+      let rect1 = Rectangle { width: 30, height: 50 };
+  
+      println!(
+~         "The perimeter of the rectangle is {} pixels.",
+~         perimeter(&rect1)
+      );
+  }
+  
+  fn area(rectangle: &Rectangle) -> u32 {
+      rectangle.width * rectangle.height
+  }
++ 
++ fn perimeter(rectangle: &Rectangle) -> u32 {
++     (rectangle.width + rectangle.height) * 2
++ }
diff --git a/tests/snapshots/output/changes,numbers.snapshot.txt b/tests/snapshots/output/changes,numbers.snapshot.txt
new file mode 100644
index 00000000..eabb3c1c
--- /dev/null
+++ b/tests/snapshots/output/changes,numbers.snapshot.txt
@@ -0,0 +1,21 @@
+   1   struct Rectangle {
+   2       width: u32,
+   3       height: u32,
+   4   }
+   5   
+   6 _ fn main() {
+   7       let rect1 = Rectangle { width: 30, height: 50 };
+   8   
+   9       println!(
+  10 ~         "The perimeter of the rectangle is {} pixels.",
+  11 ~         perimeter(&rect1)
+  12       );
+  13   }
+  14   
+  15   fn area(rectangle: &Rectangle) -> u32 {
+  16       rectangle.width * rectangle.height
+  17   }
+  18 + 
+  19 + fn perimeter(rectangle: &Rectangle) -> u32 {
+  20 +     (rectangle.width + rectangle.height) * 2
+  21 + }
diff --git a/tests/snapshots/output/changes.snapshot.txt b/tests/snapshots/output/changes.snapshot.txt
new file mode 100644
index 00000000..5695ea6b
--- /dev/null
+++ b/tests/snapshots/output/changes.snapshot.txt
@@ -0,0 +1,21 @@
+  struct Rectangle {
+      width: u32,
+      height: u32,
+  }
+  
+_ fn main() {
+      let rect1 = Rectangle { width: 30, height: 50 };
+  
+      println!(
+~         "The perimeter of the rectangle is {} pixels.",
+~         perimeter(&rect1)
+      );
+  }
+  
+  fn area(rectangle: &Rectangle) -> u32 {
+      rectangle.width * rectangle.height
+  }
++ 
++ fn perimeter(rectangle: &Rectangle) -> u32 {
++     (rectangle.width + rectangle.height) * 2
++ }
diff --git a/tests/snapshots/output/full.snapshot.txt b/tests/snapshots/output/full.snapshot.txt
new file mode 100644
index 00000000..b15296ee
--- /dev/null
+++ b/tests/snapshots/output/full.snapshot.txt
@@ -0,0 +1,25 @@
+───────┬────────────────────────────────────────────────────────────────────────
+       │ File: sample.rs
+───────┼────────────────────────────────────────────────────────────────────────
+   1   │ struct Rectangle {
+   2   │     width: u32,
+   3   │     height: u32,
+   4   │ }
+   5   │ 
+   6 _ │ fn main() {
+   7   │     let rect1 = Rectangle { width: 30, height: 50 };
+   8   │ 
+   9   │     println!(
+  10 ~ │         "The perimeter of the rectangle is {} pixels.",
+  11 ~ │         perimeter(&rect1)
+  12   │     );
+  13   │ }
+  14   │ 
+  15   │ fn area(rectangle: &Rectangle) -> u32 {
+  16   │     rectangle.width * rectangle.height
+  17   │ }
+  18 + │ 
+  19 + │ fn perimeter(rectangle: &Rectangle) -> u32 {
+  20 + │     (rectangle.width + rectangle.height) * 2
+  21 + │ }
+───────┴────────────────────────────────────────────────────────────────────────
diff --git a/tests/snapshots/output/grid,header,numbers.snapshot.txt b/tests/snapshots/output/grid,header,numbers.snapshot.txt
new file mode 100644
index 00000000..e842b5cb
--- /dev/null
+++ b/tests/snapshots/output/grid,header,numbers.snapshot.txt
@@ -0,0 +1,25 @@
+───────┬────────────────────────────────────────────────────────────────────────
+       │ File: sample.rs
+───────┼────────────────────────────────────────────────────────────────────────
+   1   │ struct Rectangle {
+   2   │     width: u32,
+   3   │     height: u32,
+   4   │ }
+   5   │ 
+   6   │ fn main() {
+   7   │     let rect1 = Rectangle { width: 30, height: 50 };
+   8   │ 
+   9   │     println!(
+  10   │         "The perimeter of the rectangle is {} pixels.",
+  11   │         perimeter(&rect1)
+  12   │     );
+  13   │ }
+  14   │ 
+  15   │ fn area(rectangle: &Rectangle) -> u32 {
+  16   │     rectangle.width * rectangle.height
+  17   │ }
+  18   │ 
+  19   │ fn perimeter(rectangle: &Rectangle) -> u32 {
+  20   │     (rectangle.width + rectangle.height) * 2
+  21   │ }
+───────┴────────────────────────────────────────────────────────────────────────
diff --git a/tests/snapshots/output/grid,header.snapshot.txt b/tests/snapshots/output/grid,header.snapshot.txt
new file mode 100644
index 00000000..a6fbca2d
--- /dev/null
+++ b/tests/snapshots/output/grid,header.snapshot.txt
@@ -0,0 +1,25 @@
+───────┬────────────────────────────────────────────────────────────────────────
+       │ File: sample.rs
+───────┼────────────────────────────────────────────────────────────────────────
+       │ struct Rectangle {
+       │     width: u32,
+       │     height: u32,
+       │ }
+       │ 
+       │ fn main() {
+       │     let rect1 = Rectangle { width: 30, height: 50 };
+       │ 
+       │     println!(
+       │         "The perimeter of the rectangle is {} pixels.",
+       │         perimeter(&rect1)
+       │     );
+       │ }
+       │ 
+       │ fn area(rectangle: &Rectangle) -> u32 {
+       │     rectangle.width * rectangle.height
+       │ }
+       │ 
+       │ fn perimeter(rectangle: &Rectangle) -> u32 {
+       │     (rectangle.width + rectangle.height) * 2
+       │ }
+───────┴────────────────────────────────────────────────────────────────────────
diff --git a/tests/snapshots/output/grid,numbers.snapshot.txt b/tests/snapshots/output/grid,numbers.snapshot.txt
new file mode 100644
index 00000000..0186dac3
--- /dev/null
+++ b/tests/snapshots/output/grid,numbers.snapshot.txt
@@ -0,0 +1,22 @@
+   1   │ struct Rectangle {
+   2   │     width: u32,
+   3   │     height: u32,
+   4   │ }
+   5   │ 
+   6   │ fn main() {
+   7   │     let rect1 = Rectangle { width: 30, height: 50 };
+   8   │ 
+   9   │     println!(
+  10   │         "The perimeter of the rectangle is {} pixels.",
+  11   │         perimeter(&rect1)
+  12   │     );
+  13   │ }
+  14   │ 
+  15   │ fn area(rectangle: &Rectangle) -> u32 {
+  16   │     rectangle.width * rectangle.height
+  17   │ }
+  18   │ 
+  19   │ fn perimeter(rectangle: &Rectangle) -> u32 {
+  20   │     (rectangle.width + rectangle.height) * 2
+  21   │ }
+───────┴────────────────────────────────────────────────────────────────────────
diff --git a/tests/snapshots/output/grid.snapshot.txt b/tests/snapshots/output/grid.snapshot.txt
new file mode 100644
index 00000000..2adebd8f
--- /dev/null
+++ b/tests/snapshots/output/grid.snapshot.txt
@@ -0,0 +1,22 @@
+       │ struct Rectangle {
+       │     width: u32,
+       │     height: u32,
+       │ }
+       │ 
+       │ fn main() {
+       │     let rect1 = Rectangle { width: 30, height: 50 };
+       │ 
+       │     println!(
+       │         "The perimeter of the rectangle is {} pixels.",
+       │         perimeter(&rect1)
+       │     );
+       │ }
+       │ 
+       │ fn area(rectangle: &Rectangle) -> u32 {
+       │     rectangle.width * rectangle.height
+       │ }
+       │ 
+       │ fn perimeter(rectangle: &Rectangle) -> u32 {
+       │     (rectangle.width + rectangle.height) * 2
+       │ }
+───────┴────────────────────────────────────────────────────────────────────────
diff --git a/tests/snapshots/output/header,numbers.snapshot.txt b/tests/snapshots/output/header,numbers.snapshot.txt
new file mode 100644
index 00000000..c1dcf63a
--- /dev/null
+++ b/tests/snapshots/output/header,numbers.snapshot.txt
@@ -0,0 +1,22 @@
+File: sample.rs
+   1 struct Rectangle {
+   2     width: u32,
+   3     height: u32,
+   4 }
+   5 
+   6 fn main() {
+   7     let rect1 = Rectangle { width: 30, height: 50 };
+   8 
+   9     println!(
+  10         "The perimeter of the rectangle is {} pixels.",
+  11         perimeter(&rect1)
+  12     );
+  13 }
+  14 
+  15 fn area(rectangle: &Rectangle) -> u32 {
+  16     rectangle.width * rectangle.height
+  17 }
+  18 
+  19 fn perimeter(rectangle: &Rectangle) -> u32 {
+  20     (rectangle.width + rectangle.height) * 2
+  21 }
diff --git a/tests/snapshots/output/header.snapshot.txt b/tests/snapshots/output/header.snapshot.txt
new file mode 100644
index 00000000..d0e167a9
--- /dev/null
+++ b/tests/snapshots/output/header.snapshot.txt
@@ -0,0 +1,22 @@
+File: sample.rs
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let rect1 = Rectangle { width: 30, height: 50 };
+
+    println!(
+        "The perimeter of the rectangle is {} pixels.",
+        perimeter(&rect1)
+    );
+}
+
+fn area(rectangle: &Rectangle) -> u32 {
+    rectangle.width * rectangle.height
+}
+
+fn perimeter(rectangle: &Rectangle) -> u32 {
+    (rectangle.width + rectangle.height) * 2
+}
diff --git a/tests/snapshots/output/numbers.snapshot.txt b/tests/snapshots/output/numbers.snapshot.txt
new file mode 100644
index 00000000..198f0355
--- /dev/null
+++ b/tests/snapshots/output/numbers.snapshot.txt
@@ -0,0 +1,21 @@
+   1 struct Rectangle {
+   2     width: u32,
+   3     height: u32,
+   4 }
+   5 
+   6 fn main() {
+   7     let rect1 = Rectangle { width: 30, height: 50 };
+   8 
+   9     println!(
+  10         "The perimeter of the rectangle is {} pixels.",
+  11         perimeter(&rect1)
+  12     );
+  13 }
+  14 
+  15 fn area(rectangle: &Rectangle) -> u32 {
+  16     rectangle.width * rectangle.height
+  17 }
+  18 
+  19 fn perimeter(rectangle: &Rectangle) -> u32 {
+  20     (rectangle.width + rectangle.height) * 2
+  21 }
diff --git a/tests/snapshots/output/plain.snapshot.txt b/tests/snapshots/output/plain.snapshot.txt
new file mode 100644
index 00000000..d66799f0
--- /dev/null
+++ b/tests/snapshots/output/plain.snapshot.txt
@@ -0,0 +1,21 @@
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let rect1 = Rectangle { width: 30, height: 50 };
+
+    println!(
+        "The perimeter of the rectangle is {} pixels.",
+        perimeter(&rect1)
+    );
+}
+
+fn area(rectangle: &Rectangle) -> u32 {
+    rectangle.width * rectangle.height
+}
+
+fn perimeter(rectangle: &Rectangle) -> u32 {
+    (rectangle.width + rectangle.height) * 2
+}