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Hello,
I'm the user that run into this bug, the exact output of the command
are:
> C-h v eldoc-documentation-function RET
eldoc-documentation-function is a variable defined in ‘eldoc.el’.
Its value is ‘ignore’
Original value was ‘eldoc-documentation-default’
This variable has an alias: ‘eldoc-documentation-strategy’.
> C-h v eldoc-documentation-strategy RET
eldoc-documentation-strategy is a variable defined in ‘eldoc.el’.
Its value is ‘ignore’
This variable is an alias for ‘eldoc-documentation-function’.
This variable is obsolete since eldoc-1.1.0; use
‘eldoc-documentation-function’ instead.