Consistent append

auth.py

@@ -130,7 +130,7 @@ def storeBasicCredentials(baseDir: str, nickname: str, password: str) -> bool:
             os.rename(passwordFile + '.new', passwordFile)
         else:
             # append to password file
-            with open(passwordFile, "a") as passfile:
+            with open(passwordFile, 'a+') as passfile:
                 passfile.write(storeStr + '\n')
     else:
         with open(passwordFile, "w") as passfile:

follow.py

@@ -520,7 +520,7 @@ def storeFollowRequest(baseDir: str,
     approveFollowsFilename = accountsDir + '/followrequests.txt'
     if os.path.isfile(approveFollowsFilename):
         if approveHandle not in open(approveFollowsFilename).read():
-            with open(approveFollowsFilename, "a") as fp:
+            with open(approveFollowsFilename, 'a+') as fp:
                 fp.write(approveHandle + '\n')
         else:
             if debug:

inbox.py

@@ -1581,7 +1581,7 @@ def populateReplies(baseDir: str, httpPrefix: str, domain: str,
         if numLines > maxReplies:
             return False
         if messageId not in open(postRepliesFilename).read():
-            repliesFile = open(postRepliesFilename, "a")
+            repliesFile = open(postRepliesFilename, 'a+')
             repliesFile.write(messageId + '\n')
             repliesFile.close()
     else: