Expand the test for {interpolation} after two double quotes

Author: Rangi42

test/asm/interpolation-after-string.asm

@@ -1,5 +1,5 @@
-def hello = $11
-def goodbye = $22
+def concat equs """++ "hi world" ++"""
+println ""{concat}""
 
 def greeting equs "hello"
 println ""{greeting}

test/asm/interpolation-after-string.err

@@ -1,3 +1,7 @@
+error: interpolation-after-string.asm(2):
+    Unknown character '{'
+error: interpolation-after-string.asm(2):
+    Unknown character '}'
 error: interpolation-after-string.asm(5):
     Unknown character '{'
 error: interpolation-after-string.asm(5):
@@ -11,4 +15,4 @@ error: interpolation-after-string.asm(8):
     syntax error, unexpected symbol
 error: interpolation-after-string.asm(8):
     Unknown character '}'
-Assembly aborted with 6 errors!
+Assembly aborted with 8 errors!

test/asm/interpolation-after-string.out

@@ -0,0 +1 @@
+hi world