azure-pipeline.yml: Fix argument to prepare-and-run-pylint.sh

Decode stderr in prefork

See merge request !31

py_codegen: Fix deprecated use of imp module.

See merge request inducer/pytools!30

Also, this changes an error message to use an '%r' format string for
reporting the bytecode version magic, to avoid printing unreadable
characters.

Tools for memory usage debugging

See merge request !29

EOCRecorder: pretty print formatting

See merge request !28

ProcessLogger: avoid spawning threads in noninteractive environments...

See merge request inducer/pytools!27

ProcessLogger: avoid spawning threads in noninteractive environments (https://github.com/firedrakeproject/firedrake/issues/1422)

Improve pdict error printing (closes #6 on gitlab)

Closes #6

See merge request !26

Add, document the constant SUPPORTS_PROCESS_TIME.

Closes #5

See merge request inducer/pytools!25

Closes #5

Pylint: Switch to YAML-based config, fix failures

Closes #4

See merge request !24

See also: ci-support!17

Cache hash value of ImmutableRecord

See merge request !23

Due to the data structure to being intended immutable, the hash value
cannot change during object lifetime. This commit caches the value
upon first evaluation.