Auto Concatenate strings

pip/exceptions.py

@@ -129,30 +129,30 @@ class VcsHashUnsupported(HashError):
     we don't have a method for hashing those."""
 
     order = 0
-    head = ("Can't verify hashes for these requirements because we don't "
-            "have a way to hash version control repositories:")
+    head = "Can't verify hashes for these requirements because we don't "
+           "have a way to hash version control repositories:"
 
 
 class DirectoryUrlHashUnsupported(HashError):
     """A hash was provided for a version-control-system-based requirement, but
     we don't have a method for hashing those."""
 
     order = 1
-    head = ("Can't verify hashes for these file:// requirements because they "
-            "point to directories:")
+    head = "Can't verify hashes for these file:// requirements because they "
+           "point to directories:"
 
 
 class HashMissing(HashError):
     """A hash was needed for a requirement but is absent."""
 
     order = 2
-    head = ('Hashes are required in --require-hashes mode, but they are '
-            'missing from some requirements. Here is a list of those '
-            'requirements along with the hashes their downloaded archives '
-            'actually had. Add lines like these to your requirements files to '
-            'prevent tampering. (If you did not enable --require-hashes '
-            'manually, note that it turns on automatically when any package '
-            'has a hash.)')
+    head = 'Hashes are required in --require-hashes mode, but they are '
+           'missing from some requirements. Here is a list of those '
+           'requirements along with the hashes their downloaded archives '
+           'actually had. Add lines like these to your requirements files to '
+           'prevent tampering. (If you did not enable --require-hashes '
+           'manually, note that it turns on automatically when any package '
+           'has a hash.)'
 
     def __init__(self, gotten_hash):
         """
@@ -183,8 +183,8 @@ class HashUnpinned(HashError):
     version."""
 
     order = 3
-    head = ('In --require-hashes mode, all requirements must have their '
-            'versions pinned with ==. These do not:')
+    head = 'In --require-hashes mode, all requirements must have their '
+           'versions pinned with ==. These do not:'
 
 
 class HashMismatch(HashError):
@@ -197,10 +197,10 @@ class HashMismatch(HashError):
 
     """
     order = 4
-    head = ('THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS '
-            'FILE. If you have updated the package versions, please update '
-            'the hashes. Otherwise, examine the package contents carefully; '
-            'someone may have tampered with them.')
+    head = 'THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS '
+           'FILE. If you have updated the package versions, please update '
+           'the hashes. Otherwise, examine the package contents carefully; '
+           'someone may have tampered with them.'
 
     def __init__(self, allowed, gots):
         """