Fix non-reproducibilities caused by time-dependent procedures.
Submitted upstream: https://github.com/ipython/ipython/pull/13640

diff --git a/IPython/sphinxext/ipython_directive.py b/IPython/sphinxext/ipython_directive.py
index 18bdfcae9..2c665ac87 100644
--- a/IPython/sphinxext/ipython_directive.py
+++ b/IPython/sphinxext/ipython_directive.py
@@ -19,7 +19,7 @@
    In [1]: 1+1
 
    In [1]: import datetime
-      ...: datetime.datetime.now()
+      ...: datetime.date.fromisoformat('2022-02-22')
 
 It supports IPython construct that plain
 Python does not understand (like magics):
@@ -28,7 +28,7 @@
 
    In [0]: import time
 
-   In [0]: %timeit time.sleep(0.05)
+   In [0]: %pdoc time
 
 This will also support top-level async when using IPython 7.0+
 
-scripts</option>
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<div class='path'>path: <a href='/guix/log/?id=6080632df8109a9c95eede3ffe02b92f59b83148'>root</a>/<a href='/guix/log/nix?id=6080632df8109a9c95eede3ffe02b92f59b83148'>nix</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/nix?id=6080632df8109a9c95eede3ffe02b92f59b83148&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-01-11 10:25:06 +0100'>2018-01-11</span></td><td><a href='/guix/commit/nix?id=7bf2a70a4ffd976d50638d3b9f2ec409763157df'>daemon: Always try to execute the builder regardless of the platform.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libstore/build.cc (runChild): Move platform check after 'execve'
call.  Check specifically for ENOEXEC.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-07 23:47:22 +0100'>2018-01-07</span></td><td><a href='/guix/commit/nix?id=f997137d0e2eba27bb1e2b282ee19ea474c41e12'>daemon: Make libbz2 an optional dependency.</a><span class='msg-avail'>...<span class='msg-tooltip'>* config-daemon.ac: Don't bail out when libbz2 is missing.  Define
'HAVE_LIBBZ2' Automake conditional.
* nix/libstore/build.cc: Wrap relevant bits in '#if HAVE_BZLIB_H'.
* nix/libstore/globals.cc (Settings::Settings): 'logCompression'
defaults to COMPRESSION_GZIP when HAVE_BZLIB_H is false.
* nix/libstore/globals.hh (CompressionType): Make 'COMPRESSION_BZIP2'
conditional on HAVE_BZLIB_H.
* nix/local.mk (guix_register_LDADD, guix_daemon_LDADD): Add -lbz2 only
when HAVE_LIBBZ2.
* nix/nix-daemon/guix-daemon.cc (parse_opt): Ignore "bzip2" when not
HAVE_BZLIB_H.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-07 23:47:22 +0100'>2018-01-07</span></td><td><a href='/guix/commit/nix?id=29a686688674dc875775305312513405fa396a06'>daemon: Add gzip log compression.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/nix-daemon/guix-daemon.cc (GUIX_OPT_LOG_COMPRESSION): New macro.
(options): Mark "disable-log-compression" as hidden and add
"log-compression".
(parse_opt): Handle GUIX_OPT_LOG_COMPRESSION.
* nix/libstore/build.cc (DerivationGoal): Add 'gzLogFile'.
(openLogFile): Initialize it when 'logCompression' is COMPRESSION_GZIP.
(closeLogFile, handleChildOutput): Honor 'gzLogFile'.
* nix/libstore/globals.hh (Settings)[compressLog]: Remove.
[logCompression]: New field.
(CompressionType): New enum.
* nix/libstore/globals.cc (Settings::Settings): Initialize it.
(update): Remove '_get' call for 'compressLog'.
* nix/local.mk (guix_daemon_LDADD, guix_register_LDADD): Add -lz.
* guix/store.scm (log-file): Handle '.gz' log files.
* tests/guix-daemon.sh: Add test with '--log-compression=gzip'.
* doc/guix.texi (Invoking guix-daemon): Adjust accordingly.
* config-daemon.ac: Check for libz and zlib.h.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-12-31 11:18:30 +0100'>2017-12-31</span></td><td><a href='/guix/commit/nix?id=091191c3dcbfb9f01070d26bf15cb2c4dd07b1b5'>list-runtime-root: Fix off-by-one in 'strip-drop' call.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/29862&gt;.
Reported by Danny Milosavljevic &lt;dannym@scratchpost.org&gt;.

* nix/scripts/list-runtime-roots.in (canonicalize-store-item): Define
'store' with a trailing "/".  Have the 'string-prefix?' call match the
'string-drop' call.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-11-26 15:58:33 +0100'>2017-11-26</span></td><td><a href='/guix/commit/nix?id=9b0713012905f3997d6fad201dba7c3d93b38b13'>list-runtime-roots: Ignore ESRCH while reading from /proc.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/29368&gt;.
Reported by Martin Castillo &lt;castilma@uni-bremen.de&gt;.

* nix/scripts/list-runtime-roots.in (referenced-files): Ignore ESRCH.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-11-12 23:53:12 +0100'>2017-11-12</span></td><td><a href='/guix/commit/nix?id=856b68bda959638201182304ded2759c7de5411b'>list-runtime-roots: Ignore PIDs we cannot access.</a><span class='msg-avail'>...<span class='msg-tooltip'>This allows running as non-root.
Fixes a regression introduced in b8f59cdc20e9d83ce63523ef917e95fcee07f134.

* nix/scripts/list-runtime-roots.in (referenced-files): Handle EACCES in
addition to ENOENT.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-11-12 22:42:17 +0100'>2017-11-12</span></td><td><a href='/guix/commit/nix?id=fb17a89912c2a3738dae716e30481c11e1c6f0ac'>list-runtime-roots: Canonicalize store items.</a><span class='msg-avail'>...<span class='msg-tooltip'>Looking at 'addAdditionalRoots' in libstore/gc.cc, it looks like it
should always have been this way.  In practice it probably doesn't make
much of a difference.

* nix/scripts/list-runtime-roots.in (canonicalize-store-item): New
procedure.
&lt;top level&gt;: Use it.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-11-12 22:42:17 +0100'>2017-11-12</span></td><td><a href='/guix/commit/nix?id=b8f59cdc20e9d83ce63523ef917e95fcee07f134'>list-runtime-roots: Do not use 'lsof'.</a><span class='msg-avail'>...<span class='msg-tooltip'>This makes things a bit faster (0.8s instead of 1.4s on my laptop).

* nix/scripts/list-runtime-roots.in (lsof-roots): Remove.
(proc-fd-roots): Return the empty list when 'scandir' returns #f.
(referenced-files): New procedure.
Use it at the top level.
</span></span></td><td>Ludovic Courtès</td></tr>