Some modifications for emitting mutable alloca slots done

chapter6.py

@@ -1,4 +1,4 @@
-# Chapter 5 - Extending the language: User-defined Operators
+# Chapter 6 - Extending the language: User-defined Operators
 
 from collections import namedtuple
 from ctypes import CFUNCTYPE, c_double
@@ -742,9 +742,6 @@ class LLVMCodeGenerator(object):
         self.func_symtab = {}
         # Create the function skeleton from the prototype.
         func = self._codegen(node.proto)
-
-
-
         # Create the entry BB in the function and set the builder to it.
         bb_entry = func.append_basic_block('entry')
         self.builder = ir.IRBuilder(bb_entry)