* gnu/packages/python-xyz.scm (python-jedi)[arguments]: Add phase
'adjust-test-for-python-3.8'.
(arguments
`(#:phases
(modify-phases %standard-phases
+ (add-before 'check 'adjust-test-for-python-3.8
+ (lambda _
+ ;; Mimic upstream commit e7feeef64 to allow for extra output lines
+ ;; in TestSetupReadline on Python 3.8. Remove for jedi > 0.17.0.
+ (substitute* "test/test_utils.py"
+ (("assert len\\(difference\\) < 20")
+ "assert len(difference) < 22"))
+ #t))
(replace 'check
(lambda _
(setenv "HOME" "/tmp")