tildify-string-alist

tildify-string-alist is a variable defined in `tildify.el'.
Its value is

nil

• This variable is obsolete since 25.1;
  use `tildify-space-string' instead.

Documentation:
Alist specifying what is a hard space in the current major mode.

Each alist item is of the form (MAJOR-MODE . STRING) or
(MAJOR-MODE . SYMBOL).

MAJOR-MODE defines major mode, for which the item applies. It can be either:
- a symbol equal to the major mode of the buffer to be fixed
- t for default item, this applies to all major modes not defined in another
alist item

STRING defines the hard space, which is inserted at places defined by
`tildify-pattern'. For example it can be "~" for TeX or " " for SGML.

The form (MAJOR-MODE . SYMBOL) defines alias item for MAJOR-MODE. For this
mode, the item for the mode SYMBOL is looked up in the alist instead.

You can customize this variable.