user-emacs-directory is a variable defined in `subr.el'.
Its value is
"~/.emacs.d/"
This variable may be risky if used as a file-local variable.
Documentation:
Directory beneath which additional per-user Emacs-specific files are placed.
Various programs in Emacs store information in this directory.
Note that this should end with a directory separator.
See also `locate-user-emacs-file'.