Normalize indentation in linux-bootstrap-1's code sections to improve readability

Booting/linux-bootstrap-1.md

@@ -313,8 +313,8 @@ Here we can see a `jmp` instruction opcode - `0xeb` to the `start_of_setup-1f` p
 Actually this is the first code that runs (aside from the previous jump instruction of course). After the kernel setup got the control from the bootloader, the first `jmp` instruction is located at `0x200` (first 512 bytes) offset from the start of the kernel real mode. This we can read in the Linux kernel boot protocol and also see in the grub2 source code:
 
 ```C
-  state.gs = state.fs = state.es = state.ds = state.ss = segment;
-  state.cs = segment + 0x20;
+state.gs = state.fs = state.es = state.ds = state.ss = segment;
+state.cs = segment + 0x20;
 ```
 
 It means that segment registers will have the following values after kernel setup starts:
@@ -435,8 +435,8 @@ BSS Setup
 The last two steps that need to happen before we can jump to the main C code, are setting up the [BSS](https://en.wikipedia.org/wiki/.bss) area and checking the "magic" signature. First, signature checking:
 
 ```assembly
-cmpl	$0x5a5aaa55, setup_sig
-jne	setup_bad
+    cmpl    $0x5a5aaa55, setup_sig
+    jne     setup_bad
 ```
 
 This simply compares the [setup_sig](https://github.com/torvalds/linux/blob/master/arch/x86/boot/setup.ld#L39) with the magic number `0x5a5aaa55`. If they are not equal, a fatal error is reported.