boot: fix indentation

Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
0xAX · Jun 17, 2018 · 01ce518 · 01ce518
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diff --git a/Booting/README.md b/Booting/README.md
@@ -9,4 +9,4 @@ This chapter describes the linux kernel boot process. Here you will see a series
 * [Kernel Decompression](linux-bootstrap-5.md) - describes preparation before kernel decompression and details of direct decompression.
 * [Kernel random address randomization](linux-bootstrap-6.md) - describes randomization of the Linux kernel load address.
 
-This chapter coincides with with `Linux kernel v4.16`.
+This chapter coincides with with `Linux kernel v4.17`.
diff --git a/Booting/linux-bootstrap-5.md b/Booting/linux-bootstrap-5.md
@@ -67,12 +67,12 @@ In the next step we can see setup of the stack pointer, resetting of the flags r
 ```assembly
     leaq	boot_stack_end(%rbx), %rsp
 
-	leaq	gdt(%rip), %rax
-	movq	%rax, gdt64+2(%rip)
-	lgdt	gdt64(%rip)
+    leaq	gdt(%rip), %rax
+    movq	%rax, gdt64+2(%rip)
+    lgdt	gdt64(%rip)
 
-	pushq	$0
-	popfq
+    pushq	$0
+    popfq
 ```
 
 If you look at the Linux kernel source code after `lgdt gdt64(%rip)` instruction, you will see that there is some additional code. This code builds trampoline to enable [5-level pagging](https://lwn.net/Articles/708526/) if need. We will consider only 4-level paging in this books, so this code will be omitted.