Issue #24631: Fixed regression in the timeit modulu with multyline setup.

diff --cc Misc/NEWS
index ffce23f422b71e697e8e6c58c75df74265858860,bb7e04d7b878645dcc569f60b77d51d22f4df52c..601b6e23fe3a5e34b545f4fd7706c7baefac6baf
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -39,6 -17,14 +39,8 @@@ Core and Builtin
  Library
  -------
  
 -- Issue #18622: unittest.mock.mock_open().reset_mock would recurse infinitely.
 -  Patch from Nicola Palumbo and Laurent De Buyst.
 -
 -- Issue #23661: unittest.mock side_effects can now be exceptions again. This
 -  was a regression vs Python 3.4. Patch from Ignacio Rossi
 -
+ - Issue #24631: Fixed regression in the timeit modulu with multyline setup.
+ 
  - Issue #24608: chunk.Chunk.read() now always returns bytes, not str.
  
  - Issue #18684: Fixed reading out of the buffer in the re module.