diff --git a/spacy/lang/th/norm_exceptions.py b/spacy/lang/th/norm_exceptions.py
index 497779cf9..ed1b3e760 100644
--- a/spacy/lang/th/norm_exceptions.py
+++ b/spacy/lang/th/norm_exceptions.py
@@ -111,4 +111,3 @@ NORM_EXCEPTIONS = {}
 for string, norm in _exc.items():
     NORM_EXCEPTIONS[string] = norm
     NORM_EXCEPTIONS[string.title()] = norm
-
diff --git a/spacy/util.py b/spacy/util.py
index 1cea8b6ca..59498ca77 100644
--- a/spacy/util.py
+++ b/spacy/util.py
@@ -510,7 +510,7 @@ def decaying(start, stop, decay):
     curr = float(start)
     while True:
         yield max(curr, stop)
-        curr -= (decay)
+        curr -= decay
 
 
 def minibatch_by_words(items, size, tuples=True, count_words=len):