Fixed a bug in the delimiter change for the assemble module

files/assemble

@@ -76,14 +76,14 @@ EXAMPLES = '''
 # ===========================================
 # Support method
 
-def assemble_from_fragments(src_path, delimiter=''):
+def assemble_from_fragments(src_path, delimiter=None):
     ''' assemble a file from a directory of fragments '''
     tmpfd, temp_path = tempfile.mkstemp()
     tmp = os.fdopen(tmpfd,'w')
     delimit_me = False
     for f in sorted(os.listdir(src_path)):
         fragment = "%s/%s" % (src_path, f)
-        if delimit_me:
+        if delimit_me and delimiter:
             tmp.write(delimiter)
         if os.path.isfile(fragment):
             tmp.write(file(fragment).read())