Removed flattening in formatter

Can be done manually with a join node that is to be added. And if the input is no flattened, list inputs/outputs can be used.

nodes/formatter.py

@@ -4,8 +4,6 @@ class ETTextFormatterNode:
     into a single string.
     """
 
-    INPUT_IS_LIST = True
-
     RETURN_TYPES = ("STRING",)
     RETURN_NAMES = ("text",)
 
@@ -13,44 +11,9 @@ class ETTextFormatterNode:
     FUNCTION = "process"
 
     def process(self, format, arg0="", arg1="", arg2="", arg3="", arg4="", arg5="", arg6="", arg7="", arg8="", arg9="") -> tuple:
-        # This looks kinda iffy, but it makes sense. I promise.
-        # 
-        # Technically, we just want to accept variables that we can
-        # format and return a single, formatted string. But due to
-        # how ComfyUI works, lists of strings can be plugged into
-        # string inputs as if they were plain strings. What happens
-        # then is that the system takes the length of the longest
-        # list passed in, padding the other ones to the same length,
-        # and calling the node's function for each entry. Finally,
-        # these entries are then again returned as a list with the
-        # longest length. This is not what we want for a simple
-        # formatter.
-        #
-        # Instead, we set the input to be a list, which makes it so
-        # process is only called once with all lists, which we can
-        # handle as we see fit. We can also return whatever we want.
-        # The caveat is that we need to handle the lists somehow,
-        # so we flatten them all to one string. Easy!
-
-        format = self.flatten(format)
-        arg0 = self.flatten(arg0)
-        arg1 = self.flatten(arg1)
-        arg2 = self.flatten(arg2)
-        arg3 = self.flatten(arg3)
-        arg4 = self.flatten(arg4)
-        arg5 = self.flatten(arg5)
-        arg6 = self.flatten(arg6)
-        arg7 = self.flatten(arg7)
-        arg8 = self.flatten(arg8)
-        arg9 = self.flatten(arg9)
-
         result = format.format(arg0=arg0, arg1=arg1, arg2=arg2, arg3=arg3, arg4=arg4, arg5=arg5, arg6=arg6, arg7=arg7, arg8=arg8, arg9=arg9)
-
         return (result,)
 
-    def flatten(self, value: list) -> str:
-        return " ".join([str(s) for s in value])
-
 
 class ETTextFormatter2Node(ETTextFormatterNode):
     @classmethod