Replace tabs with spaces and update year of copyright notices (#927)

* Update year of copyright notices

* Fix mistake in comment

* Fix typo ("algorythms")

* Replace tabs with spaces

* Remove trailing whitespace and fix mistake in comment

* Fix ExportImageAsCode missing comment rectangle corner

* Replace tab with spaces

* Replace tabs with spaces

examples/core/core_basic_window.cpp

@@ -23,40 +23,40 @@
 
 int main(int argc, char* argv[])
 {
-	// Initialization
-	//--------------------------------------------------------------------------------------
-	int screenWidth = 800;
-	int screenHeight = 450;
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
 
-	InitWindow(screenWidth, screenHeight, "raylib [core] example - basic window");
+    InitWindow(screenWidth, screenHeight, "raylib [core] example - basic window");
 
-	SetTargetFPS(60);
-	//--------------------------------------------------------------------------------------
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
 
-	// Main game loop
-	while (!WindowShouldClose())    // Detect window close button or ESC key
-	{
-		// Update
-		//----------------------------------------------------------------------------------
-		// TODO: Update your variables here
-		//----------------------------------------------------------------------------------
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        // TODO: Update your variables here
+        //----------------------------------------------------------------------------------
 
-		// Draw
-		//----------------------------------------------------------------------------------
-		BeginDrawing();
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
 
-		ClearBackground(RAYWHITE);
+        ClearBackground(RAYWHITE);
 
-		DrawText("Congrats! You created your first window!", 190, 200, 20, LIGHTGRAY);
+        DrawText("Congrats! You created your first window!", 190, 200, 20, LIGHTGRAY);
 
-		EndDrawing();
-		//----------------------------------------------------------------------------------
-	}
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
 
-	// De-Initialization
-	//--------------------------------------------------------------------------------------   
-	CloseWindow();        // Close window and OpenGL context
+    // De-Initialization
+    //--------------------------------------------------------------------------------------   
+    CloseWindow();        // Close window and OpenGL context
     //--------------------------------------------------------------------------------------
 
-	return 0;
+    return 0;
 }