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+======Synopsis:======
+[[call]]
+======Description:======
+[[CALL]] produces a gdb/dbx-like stack trace of the alias currently being
+executed.  It returns a list of the commands currently being executed,
+tracing back from the current command, to the command that called it,
+and so forth until the [[CALL]] command itself it listed.  A deeply nested
+alias might have the following alias stack:
+      [ 0] call
+      [ 1] go
+      [ 2] get_set
+      [ 3] get_ready
+      [ 4] on_your_marks
+      [ 5] /superalias
+In this example, [[CALL]] was run from the "go" alias, which in turn was
+called from "get_set", which was called from "get_ready", and so on, all
+the way down to the original command executed.
+Command names appear precisely as they are typed in (which means, if
+an alias is called with a / in front of it, the slash will appear in
+the stack listing).  Additionally, in the (unlikely) event that EPIC
+were to crash, [[CALL]] is executed before the client terminates, to aid
+in debugging.
+======History======
+[[CALL]] first appeared in EPIC3.001.
+#$EPIC: call.txt,v 1.2 2006/07/17 19:41:50 sthalik Exp $