Fixed encoding discovery issue

* utf-32 encoding css' might have been discovered as beeing as utf-16 due to the boms starting with the same values

filertags/signals.py

@@ -39,16 +39,16 @@ def _is_in_memory(file_):
 
 
 def _get_encoding_from_bom(content):
-    bom_to_encoding = {
-        codecs.BOM_UTF8: 'utf-8-sig',
-        codecs.BOM_UTF16_LE: 'utf-16',
-        codecs.BOM_UTF16_BE: 'utf-16',
-        codecs.BOM_UTF32_LE: 'utf-32',
-        codecs.BOM_UTF32_BE: 'utf-32'
-        }
-    for bom in bom_to_encoding:
+    import ipdb; ipdb.set_trace()
+    bom_to_encoding = (
+        (codecs.BOM_UTF32_LE, 'utf-32'),
+        (codecs.BOM_UTF32_BE, 'utf-32'),
+        (codecs.BOM_UTF8, 'utf-8-sig'),
+        (codecs.BOM_UTF16_LE, 'utf-16'),
+        (codecs.BOM_UTF16_BE, 'utf-16'))
+    for bom, encoding in bom_to_encoding:
         if content.startswith(bom):
-            return bom_to_encoding[bom]
+            return encoding
     return None