Incorrect requirements can cause memory swapping.

Incorrect requirements can cause memory swapping.

'python' clinic block, not a 'clinic' clinic block.  Patch written by
Ryan Smith-Roberts.

a help on environment with too small COLUMNS.  Based on patch by
Elazar Gershuni.

a help on environment with too small COLUMNS.  Based on patch by
Elazar Gershuni.

value.

(fixes error in patch for issue #18960)

value.

(fixes error in patch for issue #18960)

* The first line of Python script could be executed twice when the source
encoding (not equal to 'utf-8') was specified on the second line.

* Now the source encoding declaration on the second line isn't effective if
the first line contains anything except a comment.

* As a consequence, 'python -x' works now again with files with the source
encoding declarations specified on the second file, and can be used again
to make Python batch files on Windows.

* The tokenize module now ignore the source encoding declaration on the second
line if the first line contains anything except a comment.

* IDLE now ignores the source encoding declaration on the second line if the
first line contains anything except a comment.

* 2to3 and the findnocoding.py script now ignore the source encoding
declaration on the second line if the first line contains anything except
a comment.

* The first line of Python script could be executed twice when the source
encoding (not equal to 'utf-8') was specified on the second line.

* Now the source encoding declaration on the second line isn't effective if
the first line contains anything except a comment.

* As a consequence, 'python -x' works now again with files with the source
encoding declarations specified on the second file, and can be used again
to make Python batch files on Windows.

* The tokenize module now ignore the source encoding declaration on the second
line if the first line contains anything except a comment.

* IDLE now ignores the source encoding declaration on the second line if the
first line contains anything except a comment.

* 2to3 and the findnocoding.py script now ignore the source encoding
declaration on the second line if the first line contains anything except
a comment.

consumption.

consumption.

And a news item rephrase.

And more news item tweaks.

exception on error instead of returning -1.

error instead of returning -1.

This code was an artifact of issuing a DeprecationWarning for the lack
of loader.exec_module().  However, we have deferred such warnings to
later Python versions.

is modified during the lifetime of the Python process after zipimport has
already cached the zip's table of contents we detect this and recover
rather than read bad data from the .zip (causing odd import errors).

is modified during the lifetime of the Python process after zipimport has
already cached the zip's table of contents we detect this and recover
rather than read bad data from the .zip (causing odd import errors).

Now makes CPython build without warnings on OS X under Clang with
-Wno-unused-value -Wno-empty-body -Qunused-arguments
-Wno-deprecated-declarations.

Thanks to David Watson for taking an initial stab at a solution.

old methods now provide implementations when PEP 451 APIs are present.

This should help with backwards-compatibility with code which has not
been updated to work with PEP 451.

to improve readability.