diff -r b112bfdde5cc -r 5b6ad7a7fd9d plcopen/structures.py
--- a/plcopen/structures.py	Sat Aug 19 21:06:54 2017 +0300
+++ b/plcopen/structures.py	Mon Aug 21 21:55:18 2017 +0300
@@ -77,9 +77,9 @@
                [GetBlockInfos(pous) for pous in lib.getpous()]}
               for libname, lib in StdBlckLibs.iteritems()]
 
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 #                             Test identifier
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 
 IDENTIFIER_MODEL = re.compile(
     "(?:%(letter)s|_(?:%(letter)s|%(digit)s))(?:_?(?:%(letter)s|%(digit)s))*$" %
@@ -92,9 +92,9 @@
     """
     return IDENTIFIER_MODEL.match(identifier) is not None
 
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 #                        Standard functions list generation
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 
 
 def csv_file_to_table(file):
@@ -285,9 +285,9 @@
         BlkLst = StdBlckDct.setdefault(desc["name"], [])
         BlkLst.append((section["name"], desc))
 
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 #                            Languages Keywords
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 
 # Keywords for Pou Declaration
 POU_BLOCK_START_KEYWORDS = ["FUNCTION", "FUNCTION_BLOCK", "PROGRAM"]