added test files for symbol substitutions

git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@393 4df02467-bbd4-4a76-a152-e7ce94205b78

testing/errors/subst1.a

@@ -0,0 +1,3 @@
+	*=$1000
+	;sub= we do not define sub at all
+base?sub	nop	; -> "neither number nor string"

testing/errors/subst2.a

@@ -0,0 +1,3 @@
+	*=$1000
+	!set sub = [2,3]	; sub is a list
+base?sub	nop	; -> "neither number nor string"

testing/errors/subst3.a

@@ -0,0 +1,3 @@
+	*=$1000
+		lda sub	; sub is undefined
+base?sub	nop	; -> "undefined or not integer"

testing/errors/subst4.a

@@ -0,0 +1,3 @@
+	*=$1000
+	!set sub = .5	; sub is a float
+base?sub	nop	; -> "undefined or not integer"

testing/errors/subst5.a

@@ -0,0 +1,3 @@
+	*=$1000
+	!set sub = 7	; sub is defined okay, but:
+base?(sub	nop	; -> "does not end with ')' character."