2.6- bug: while..and: stmt - on one line

If 2.6 or before POP_BLOCK after a JUMP_IF_FALSE does not
constitute a new statement. The POP_BLOCK is really part
of the JUMP_IF_FALSE. In Python 2.7+ it's a single op.

uncompyle6/scanners/scanner26.py

@@ -71,12 +71,20 @@ class Scanner26(scan.Scanner2):
         return
 
     def disassemble(self, co, classname=None, code_objects={}, show_asm=None):
-        '''
-        Disassemble a code object, returning a list of 'Token'.
+        """
+        Pick out tokens from an uncompyle6 code object, and transform them,
+        returning a list of uncompyle6 'Token's.
 
-        The main part of this procedure is modelled after
-        dis.disassemble().
-        '''
+        The tranformations are made to assist the deparsing grammar.
+        Specificially:
+           -  various types of LOAD_CONST's are categorized in terms of what they load
+           -  COME_FROM instructions are added to assist parsing control structures
+           -  MAKE_FUNCTION and FUNCTION_CALLS append the number of positional arguments
+
+        Also, when we encounter certain tokens, we add them to a set which will cause custom
+        grammar rules. Specifically, variable arg tokens like MAKE_FUNCTION or BUILD_LIST
+        cause specific rules for the specific number of arguments they take.
+        """
 
         show_asm = self.show_asm if not show_asm else show_asm
         # show_asm = 'both'
@@ -102,9 +110,6 @@ class Scanner26(scan.Scanner2):
         self.build_lines_data(co, n)
         self.build_prev_op(n)
 
-        # linestarts contains block code adresses (addr,block)
-        self.linestarts = list(self.opc.findlinestarts(co))
-
         # class and names
         if classname:
             classname = '_' + classname.lstrip('_') + '__'