add option for record delimiter

pyaccuwage/__init__.py

@@ -38,7 +38,7 @@ def test_dump():
         record.EmployeeWageRecord(),
         ]
     out = io.BytesIO()
-    dump(records, out)
+    dump(records, out, None)
     return out
 
 
@@ -79,14 +79,16 @@ def loads(s):
     return load(fp)
 
 
-def dump(records, fp):
+def dump(records, fp, delim=None):
     for r in records:
         fp.write(r.output())
+        if delim:
+            fp.write(delim)
 
-def dumps(records):
+def dumps(records, delim=None):
     import io
     fp = io.BytesIO()
-    dump(records, fp)
+    dump(records, fp, delim=delim)
     fp.seek(0)
     return fp.read()