[basic.pre] 'variable' is not an entity

[h0nzZik]

According to 6.1.3, a variable is not an entity. This seems wrong, as a variable can be introduced by declaration and can be a local entity. I suggest adding variable to the list.

[JohelEGP]

See also #6523 (comment).

[eisenwave]

[basic.pre] now states

An entity is a variable, [...]

#8008 (P2996R13) made those changes.