=== modified file 'data.awk'
--- data.awk	2015-09-17 07:09:55 +0000
+++ data.awk	2015-09-09 16:23:54 +0000
@@ -136,14 +136,11 @@
 
 function get(varname) {
 	if(!find(varname)) {
-		if(ENVIRON["DATA_AWK_EMPTY_GET"]) {
-			return ""
-		}
 		print "error: undefined variable '"varname"'" >"/dev/stderr"
 		exit 1
 	}
 	if(DEBUG) {
-		print "get →" varname "← = →"found"←" >"/dev/stderr"
+		print "get →" varname "← ⇒ →"found"←" >"/dev/stderr"
 	}
 	return found
 }