diff --git a/exercises/106_files.zig b/exercises/106_files.zig
index 450ff96..ffa0f86 100644
--- a/exercises/106_files.zig
+++ b/exercises/106_files.zig
@@ -8,13 +8,13 @@
 // The File System provide a hierarchical structure for storing files
 // by organizing files into directories, which hold files and other directories,
 // thus creating a tree structure for navigating.
-// 
+//
 // Fortunately, zig standard library provide a simple api for interacting
 // with the file system, see the detail documentation here
 //
 // https://ziglang.org/documentation/master/std/#std.fs
 //
-// In this exercise, we'll try to 
+// In this exercise, we'll try to
 //   - create a new directory
 //   - open a file in the directory
 //   - write to the file.
@@ -67,14 +67,14 @@ pub fn main() !void {
 // 2. print the content of the file in the console with command
 //    >> cat ./output/zigling.txt
 //
-// 
+//
 // More on Creating files
-// 
+//
 // notice in:
 // ... try output_dir.createFile("zigling.txt", .{});
 //                                              ^^^
 //                 we passed this anonymous struct to the function call
-//                 
+//
 // this is the struct `CreateFlag` with default fields
 // {
 //      read: bool = false,
@@ -84,7 +84,7 @@ pub fn main() !void {
 //      lock_nonblocking: bool = false,
 //      mode: Mode = default_mode
 // }
-// 
+//
 // Question:
 //   - what should you do if you want to also read the file after opening it?
 //   - go to documentation of the struct `std.fs.Dir` here