Emacs

fix: Compatible to Emacs 26 #693

Job	Run time
test (ubuntu-latest, 26.3, false)	39s
test (ubuntu-latest, 27.2, false)	32s
test (ubuntu-latest, 28.2, false)	33s
test (ubuntu-latest, 29.1, false)	34s
test (macos-latest, 26.3, false)	2m 40s
test (macos-latest, 27.2, false)	2m 40s
test (macos-latest, 28.2, false)	2m 4s
test (macos-latest, 29.1, false)	2m 38s
test (windows-latest, 26.3, false)	1m 10s
test (windows-latest, 27.2, false)	38s
test (windows-latest, 28.2, false)	41s
test (windows-latest, 29.1, false)	44s
test (ubuntu-latest, snapshot, true)	33s
test (macos-latest, snapshot, true)	3m 4s
test (windows-latest, snapshot, true)	38s
	19m 48s

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