Add MIT license notice at the top of source files.

README.md

@@ -23,7 +23,7 @@ $ zig build run
 Press escape to close the program.
 
 # License
-Copyright (C) 2021 KikooDX
+Copyright (c) 2021 KikooDX
 
 This project is under the MIT license.
 See LICENSE for more details.

src/level.zig

@@ -1,3 +1,8 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2021 KikooDX
+// This file is part of [KBLE](https://sr.ht/~kikoodx/kble), which is
+// MIT licensed. The MIT license requires this copyright notice to be
+// included in all copies and substantial portions of the software.
 //! Level structure, grid containing tile data.
 const ray = @cImport({
     @cInclude("raylib.h");

src/main.zig

@@ -1,3 +1,8 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2021 KikooDX
+// This file is part of [KBLE](https://sr.ht/~kikoodx/kble), which is
+// MIT licensed. The MIT license requires this copyright notice to be
+// included in all copies and substantial portions of the software.
 const ray = @cImport({
     @cInclude("raylib.h");
 });
@@ -74,7 +79,7 @@ pub fn main() !void {
 
             var selection_update: movement.SelectionUpdate = undefined;
 
-            // Zoom. TODO: move to functions.
+            // TODO: move to functions.
             switch (action) {
                 // Movement.
                 'h' => selection_update = movement.move_left(&cursor, 1, true),

src/movement.zig

@@ -1,3 +1,8 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2021 KikooDX
+// This file is part of [KBLE](https://sr.ht/~kikoodx/kble), which is
+// MIT licensed. The MIT license requires this copyright notice to be
+// included in all copies and substantial portions of the software.
 //! Movement functions.
 const std = @import("std");
 const expect = std.testing.expect;

src/rect.zig

@@ -1,3 +1,8 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2021 KikooDX
+// This file is part of [KBLE](https://sr.ht/~kikoodx/kble), which is
+// MIT licensed. The MIT license requires this copyright notice to be
+// included in all copies and substantial portions of the software.
 const std = @import("std");
 const expect = std.testing.expect;
 

src/vec2.zig

@@ -1,3 +1,8 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2021 KikooDX
+// This file is part of [KBLE](https://sr.ht/~kikoodx/kble), which is
+// MIT licensed. The MIT license requires this copyright notice to be
+// included in all copies and substantial portions of the software.
 //! This module provides functions for creating and manipulating 2D
 //! vectors with integer precision.
 const expect = @import("std").testing.expect;