Eval local variable improvements.
Eval local variable improvements.

To reduce the liklihood of clashes with identifiers in the evaled code,
$.user.eval now has only a single, awkwardly-named parameter and has no
local variables of its own.  Conversely, however, it has a few local
variables with short, convenient names as aliases for commonly-used
values.

google/CodeCity,google/CodeCity,NeilFraser/CodeCity,NeilFraser/CodeCity,google/CodeCity,NeilFraser/CodeCity,google/CodeCity,NeilFraser/CodeCity