Show line numbers in 2.6 "after" asm ..

start to understand some of the Python 2.6 bytecode parse failures.

uncompyle6/scanners/scanner26.py

@@ -279,9 +279,9 @@ class Scanner26(scan.Scanner2):
                 pass
             pass
 
-        if show_asm:
+        if show_asm in ('both', 'after'):
             for t in tokens:
-                print(t)
+                print(t.format(line_prefix='L.'))
             print()
         return tokens, customize