using spaces for indentation for HACK
diff --git a/HACK b/HACK
index 98c8846..33afc87 100644
--- a/HACK
+++ b/HACK
@@ -1,23 +1,23 @@
Capstone source is organized as followings.
-. <- core engine + README + COMPILE etc
-├── arch <- code handling disasm for each arch
-│ ├── AArch64 <- ARM64 (aka ARMv8)
-│ ├── ARM <- ARM
-│ ├── Mips <- Mips
-│ └── X86 <- X86
-├── bindings <- all bindings
-│ ├── csharp <- C# bindings + test code
-│ ├── java <- Java bindings + test code
-│ ├── ocaml <- Ocaml bindings + test code
-│ ├── python <- Python bindings + test code
-│ └── ruby <- Ruby bindings + test code
-├── include <- API headers in C (*.h)
-├── release <- Precompiled binaries
+. <- core engine + README + COMPILE etc
+├── arch <- code handling disasm engine for each arch
+│ ├── AArch64 <- ARM64 (aka ARMv8) code
+│ ├── ARM <- ARM code
+│ ├── Mips <- Mips code
+│ └── X86 <- X86
+├── bindings <- all bindings
+│ ├── csharp <- C# bindings + test code
+│ ├── java <- Java bindings + test code
+│ ├── ocaml <- Ocaml bindings + test code
+│ ├── python <- Python bindings + test code
+│ └── ruby <- Ruby bindings + test code
+├── include <- API headers in C (*.h)
+├── release <- Precompiled binaries
│ ├── linux
│ ├── mac
│ └── windows
-├── tests <- Test code (in C)
+├── tests <- Test code (in C)
Follow COMPILE to see how to compile and run code.