Invite tokens were trying to save to the wrong place, but failing anyway, and some other bugs.

backends/file.py

@@ -15,7 +15,7 @@ def _load(name,pos,file,obj):
 	for line in linegen(file):
 		split=line.split(',')
 		if split[pos]==name: return obj(*split)
-	raise Exception('No such',obj.__name__,'with identifier',name)
+	raise Exception(f'No such {obj.__name__} with identifier {name}')
 def _load_multi(name,pos,file,obj):
 	out=[]
 	for line in linegen(file):
@@ -62,7 +62,7 @@ def delete_invite(token):
 def linegen(path):
 	i=0
 	file=open(path)
-	line=file.readline()
+	line=file.readline().rstrip('\n') # Maybe sometimes there won't be one.
 	while line:
 		i+=1
 		response=yield line
@@ -91,7 +91,7 @@ def writefile(path,action,post=None):
 	while line:
 		i+=1
 		action(write,i,line)
-		line=file.readline()
+		line=file.readline().rstrip('\n')
 	if post is not None: post(write)
 	file.close()
 	write.close()