"requested before defined" warning includes the regular expression instead of the attribute name

[mjstahl]

For example:

I believe this issue is caused by using requested as opposed to attributeName in the following line:

can-view-callbacks/can-view-callbacks.js

Line 107 in 87402fa

dev.warn("can-view-callbacks: " + requested+ " custom attribute behavior requested before it was defined. Make sure "+attributeName+" is defined before it is needed.");