Update idna library 2.7 (0f50bdc) → 2.8 (032fc55).

CHANGES.md

@@ -4,6 +4,7 @@
 * Update Certifi 2018.08.24 (8be9f89) to 2018.10.15 (a462d21)
 * Update dateutil 2.7.2 (49690ee) to 2.7.5 (e954819)
 * Update html5lib 1.1-dev (e9ef538) to 1.1-dev (4f92357)
+* Update idna library 2.7 (0f50bdc) to 2.8 (032fc55)
 * Update MsgPack 0.5.6 (d4675be) to 0.6.0 (197e307)
 * Update Requests library 2.19.1 (2c6a842) to 2.20.1 (57d7284)
 * Update Six compatibility library 1.11.0 (68112f3) to 1.11.0 (0b4265e)

lib/idna/core.py

@@ -267,10 +267,7 @@ def alabel(label):
 
     try:
         label = label.encode('ascii')
-        try:
-            ulabel(label)
-        except IDNAError:
-            raise IDNAError('The label {0} is not a valid A-label'.format(label))
+        ulabel(label)
         if not valid_label_length(label):
             raise IDNAError('Label too long')
         return label
@@ -303,6 +300,8 @@ def ulabel(label):
     label = label.lower()
     if label.startswith(_alabel_prefix):
         label = label[len(_alabel_prefix):]
+        if label.decode('ascii')[-1] == '-':
+            raise IDNAError('A-label must not end with a hyphen')
     else:
         check_label(label)
         return label.decode('ascii')

lib/idna/package_data.py

@@ -1,2 +1,2 @@
-__version__ = '2.7'
+__version__ = '2.8'