[issue29463] Add `docstring` attribute to AST nodes

[INADA Naoki]

INADA Naoki added the comment:

This patch affects firstlineno and lnotab of module and class, but not functions.

module:
-<code object <module> at 0x7f053a8f8b70, file "Lib/importlib/_bootstrap.py", line 8>
+<code object <module> at 0x7fdefbf10340, file "Lib/importlib/_bootstrap.py", line 25>
 filename Lib/importlib/_bootstrap.py
-firstlineno: 8
+firstlineno: 25
-lnotab: b'\x04\x11\x04\x02\x08\x08\x08\x07\x04\x02\x04\x03\x10\x04\x0eD\x0e\x15\x0e\x13\x08\x13\x08\x13\x08\x0b\x0e\x08\x08\x0b\x08\x0c\x08\x10\x08$\x0e\x1b\x0ee\x10\x1a\x06\x03\n-\x0e<\x08\x11\x08\x11\x08\x19\x08\x1d\x08\x17\x08\x10\x0eI\x0eM\x0e\r\x08\t\x08\t\n/\x08\x14\x04\x01\x08\x02\x08\x1b\x08\x06\n\x19\x08\x1f\x08\x1b\x12#\x08\x07\x08/'
-  8           0 LOAD_CONST               0 ('Core implementation of import.\n\nThis module is NOT meant to be directly imported! It has been designed such\nthat it can be bootstrapped into Python as the implementation of import. As\nsuch it requires the injection of specific modules and attributes in order to\nwork. One should use importlib as the public-facing version of this module.\n\n')
+lnotab: b'\x04\x00\x04\x02\x08\x08\x08\x07\x04\x02\x04\x03\x10\x04\x0eD\x0e\x15\x0e\x13\x08\x13\x08\x13\x08\x0b\x0e\x08\x08\x0b\x08\x0c\x08\x10\x08$\x0e\x1b\x0ee\x10\x1a\x06\x03\n-\x0e<\x08\x11\x08\x11\x08\x19\x08\x1d\x08\x17\x08\x10\x0eI\x0eM\x0e\r\x08\t\x08\t\n/\x08\x14\x04\x01\x08\x02\x08\x1b\x08\x06\n\x19\x08\x1f\x08\x1b\x12#\x08\x07\x08/'
+ 25           0 LOAD_CONST               0 ('Core implementation of import.\n\nThis module is NOT meant to be directly imported! It has been designed such\nthat it can be bootstrapped into Python as the implementation of import. As\nsuch it requires the injection of specific modules and attributes in order to\nwork. One should use importlib as the public-facing version of this module.\n\n')
               2 STORE_NAME               0 (__doc__)
-
- 25           4 LOAD_CONST               1 (None)
+              4 LOAD_CONST               1 (None)
               6 STORE_GLOBAL             1 (_bootstrap_external)
 

class:
-<code object _ModuleLock at 0x7f053ab61db0, file "Lib/importlib/_bootstrap.py", line 51>
+<code object _ModuleLock at 0x7fdefc61c580, file "Lib/importlib/_bootstrap.py", line 51>
 filename Lib/importlib/_bootstrap.py
 firstlineno: 51
-lnotab: b'\x08\x04\x04\x02\x08\x08\x08\x0c\x08\x19\x08\r'
+lnotab: b'\x0c\x06\x08\x08\x08\x0c\x08\x19\x08\r'
  51           0 LOAD_NAME                0 (__name__)
               2 STORE_NAME               1 (__module__)
               4 LOAD_CONST               0 ('_ModuleLock')
               6 STORE_NAME               2 (__qualname__)
-
- 55           8 LOAD_CONST               1 ('A recursive lock implementation which is able to detect deadlocks\n    (e.g. thread 1 trying to take locks A then B, and thread 2 trying to\n    take locks B then A).\n    ')
+              8 LOAD_CONST               1 ('A recursive lock implementation which is able to detect deadlocks\n    (e.g. thread 1 trying to take locks A then B, and thread 2 trying to\n    take locks B then A).\n    ')
              10 STORE_NAME               3 (__doc__)

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29463>
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