Clarify differences between SAY and SAY_EVALUATED

[Argent77]

The WeiDU documentation provides the following description (and code sample) for SAY_EVALUATED:

Any WeiDU variables (enclosed in %s) inside stringWithVars are replaced by their values and the resulting string (constructed at mod-installation time!) is added to DIALOG.TLK and its string reference it written to the offset. Example:

COPY_EXISTING_REGEXP ~RING.*.ITM~ ~override~
  READ_LONG 0x38 cost
  SAY_EVALUATED IDENTIFIED_DESC
    ~I Am %SOURCE_RES%, I Cost %cost%~

Description and code sample are technically correct. However, the same result can also be achieved simply by replacing SAY_EVALUATED with SAY. What are the notable differences between these two commands?

[FredrikLindgren]

I can only assume there was originally a difference between the two, but it seems like maybe the D compiler gained the ability to resolve variables at some point, which indirectly made SAY equal to SAY_EVALUATED. The main difference now seems to be that SAY takes a text while SAY_EVALUATED takes a String. I'll make note of it.

[FredrikLindgren]

Clarified in e0e7f79.