diff --git a/src/bin/test-exception-double-fault-stack-overflow.rs b/src/bin/test-exception-double-fault-stack-overflow.rs
index 5f366668..50ea960f 100644
--- a/src/bin/test-exception-double-fault-stack-overflow.rs
+++ b/src/bin/test-exception-double-fault-stack-overflow.rs
@@ -19,7 +19,7 @@ use core::panic::PanicInfo;
 pub extern "C" fn _start() -> ! {
     blog_os::gdt::init();
     init_idt();
-    
+
     fn stack_overflow() {
         stack_overflow(); // for each recursion, the return address is pushed
     }
@@ -52,14 +52,14 @@ pub fn panic(info: &PanicInfo) -> ! {
     loop {}
 }
 
-
 use x86_64::structures::idt::{ExceptionStackFrame, Idt};
 
 lazy_static! {
     static ref IDT: Idt = {
         let mut idt = Idt::new();
         unsafe {
-            idt.double_fault.set_handler_fn(double_fault_handler)
+            idt.double_fault
+                .set_handler_fn(double_fault_handler)
                 .set_stack_index(blog_os::gdt::DOUBLE_FAULT_IST_INDEX);
         }
 
@@ -72,8 +72,9 @@ pub fn init_idt() {
 }
 
 extern "x86-interrupt" fn double_fault_handler(
-    _stack_frame: &mut ExceptionStackFrame, _error_code: u64)
-{
+    _stack_frame: &mut ExceptionStackFrame,
+    _error_code: u64,
+) {
     serial_println!("ok");
 
     unsafe {
diff --git a/src/gdt.rs b/src/gdt.rs
index 3274c405..be448606 100644
--- a/src/gdt.rs
+++ b/src/gdt.rs
@@ -17,12 +17,17 @@ lazy_static! {
         };
         tss
     };
-
     static ref GDT: (GlobalDescriptorTable, Selectors) = {
         let mut gdt = GlobalDescriptorTable::new();
         let code_selector = gdt.add_entry(Descriptor::kernel_code_segment());
         let tss_selector = gdt.add_entry(Descriptor::tss_segment(&TSS));
-        (gdt, Selectors { code_selector, tss_selector })
+        (
+            gdt,
+            Selectors {
+                code_selector,
+                tss_selector,
+            },
+        )
     };
 }
 
diff --git a/src/lib.rs b/src/lib.rs
index faad4fc9..affb8720 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -13,9 +13,9 @@ extern crate array_init;
 #[cfg(test)]
 extern crate std;
 
+pub mod gdt;
 pub mod serial;
 pub mod vga_buffer;
-pub mod gdt;
 
 pub unsafe fn exit_qemu() {
     use x86_64::instructions::port::Port;
diff --git a/src/main.rs b/src/main.rs
index b0e89dda..361b7e7b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -49,7 +49,8 @@ lazy_static! {
         let mut idt = Idt::new();
         idt.breakpoint.set_handler_fn(breakpoint_handler);
         unsafe {
-            idt.double_fault.set_handler_fn(double_fault_handler)
+            idt.double_fault
+                .set_handler_fn(double_fault_handler)
                 .set_stack_index(blog_os::gdt::DOUBLE_FAULT_IST_INDEX);
         }
 
@@ -66,8 +67,9 @@ extern "x86-interrupt" fn breakpoint_handler(stack_frame: &mut ExceptionStackFra
 }
 
 extern "x86-interrupt" fn double_fault_handler(
-    stack_frame: &mut ExceptionStackFrame, _error_code: u64)
-{
+    stack_frame: &mut ExceptionStackFrame,
+    _error_code: u64,
+) {
     println!("EXCEPTION: DOUBLE FAULT\n{:#?}", stack_frame);
     loop {}
 }