Back out fix for issue #13886; it introduced a new bug in interactive readline use.

diff --cc Lib/test/test_builtin.py
Simple merge

diff --cc Misc/NEWS
index d4fef95b68805ea44912e806857b26914b1d02dd,e89f83e4b6a784692b7ddc2c5afaf227f925a799..a8c047b61e32a7cd7cbf8f378cc4a1a506bb3fa0
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -15,14 -17,6 +15,10 @@@ Core and Builtin
  
  - Issue #16979: Fix error handling bugs in the unicode-escape-decode decoder.
  
- - Issue #13886: Fix input() to not strip out input bytes that cannot be decoded
-   using the locale encoding. Also fix sporadic failures in test_builtin due to
-   dependence on whether the readline module has previously been imported.
- 
 +- Issue #16772: The base argument to the int constructor no longer accepts
 +  floats, or other non-integer objects with an __int__ method.  Objects
 +  with an __index__ method are now accepted.
 +
  - Issue #10156: In the interpreter's initialization phase, unicode globals
    are now initialized dynamically as needed.
  

diff --cc Modules/readline.c
Simple merge