Formatting and adding the requirements that were removed as part of the "Included charset detection" patch that was reverted. Added all but chardet~=3.0.4 which is not needed with this fix.

offlineimap/folder/Base.py

@@ -370,7 +370,7 @@ class BaseFolder:
         return len(self.getmessagelist())
 
     def getmessage(self, uid):
-        """Returns and email message object."""
+        """Returns an email message object."""
 
         raise NotImplementedError
 
@@ -662,7 +662,7 @@ class BaseFolder:
         """Adds new header to the provided message.
 
         Arguments:
-        - msg: message itself
+        - msg: message object
         - headername: name of the header to add
         - headervalue: value of the header to add
 
@@ -682,7 +682,7 @@ class BaseFolder:
         Header name is case-insensitive.
 
         Arguments:
-        - msg: message itself
+        - msg: message object
         - headername: name of the header to be searched
 
         Returns: header value or None if no such header was found.
@@ -697,7 +697,7 @@ class BaseFolder:
         Header name is case-insensitive.
 
         Arguments:
-        - msg: message itself
+        - msg: message object
         - headername: name of the header to be searched
 
         Returns: list of header values or empty list if no such header was
@@ -711,7 +711,7 @@ class BaseFolder:
         """Deletes headers in the given list from the message.
 
         Arguments:
-        - msg: message itself
+        - msg: message object
         - header_list: list of headers to be deleted or just the header name
 
         """
@@ -731,8 +731,8 @@ class BaseFolder:
         Date field header by default.
 
         Arguments:
-        - msg: message itself
-        - header: headers to extract the date from 
+        - msg: message object
+        - header: header to extract the date from 
 
         Returns: timestamp or `None` in the case of failure.
         """

offlineimap/folder/Maildir.py

@@ -254,7 +254,7 @@ class MaildirFolder(BaseFolder):
 
     # Interface from BaseFolder
     def getmessage(self, uid):
-        """Returns and email message object."""
+        """Returns an email message object."""
 
         filename = self.messagelist[uid]['filename']
         filepath = os.path.join(self.getfullname(), filename)

requirements.txt

@@ -3,3 +3,8 @@ gssapi[kerberos]
 portalocker[cygwin]
 rfc6555
 distro
+
+imaplib2~=3.5
+urllib3~=1.25.9
+certifi~=2020.6.20
+