Fix README formatting error

Author: franko

README.md

@@ -85,8 +85,7 @@ This means that LuaJIT's C implementation perform the three operations:
 in one single pass.
 This approach is remarkable on itself and very efficient but it makes difficult to modify or extend the programming language.
 
-Parsing Rule example
-~~~~~
+### Parsing Rule example ###
 
 To illustrate how the parsing work in the language toolkit let us make an example.
 The grammar rule for the "return" statement is:
@@ -206,8 +205,7 @@ Otherwise the program `luajit-x` works exactly as luajit itself and accept the s
 
 This means that you can experiment with the language by modifying the Lua implementation of the language and test the changes immediately without recompiling anything by using `luajit-x` as a REPL.
 
-Generated Bytecode
-~~~~~~~~~~~~
+### Generated Bytecode ###
 
 You can inspect the bytecode generated by the language toolkit by using the "-b" options.
 They can be invoked either with standard luajit by using "run.lua" or directly using the customized program `luajit-x`.
@@ -261,8 +259,7 @@ In the example above the generated bytecode will be *identical* to those generat
 This is not an hazard since the Language Toolkit's bytecode generator is designed to produce the same bytecode that LuaJIT itself would generate.
 Yet in some cases the generated code will differ but this is not considered a problem as long as the generated code is still correct.
 
-Bytecode Annotated Dump
-~~~~~~~~~~~~~~
+### Bytecode Annotated Dump ###
 
 In addition to the standard LuaJIT bytecode functions the language toolkit support also a special debug mode where the bytecode in printed byte-by-byte in hex format with some annotations on the right side of the screen.
 The annotations will explain the meaning of each chunk of bytes and decode them as appropriate.