Normalize minid and maxlen docs (#1593)

Co-authored-by: Chayim <[email protected]>

Author: Andrew-Chen-Wang

redis/commands.py

@@ -1820,16 +1820,16 @@ def xadd(self, name, fields, id='*', maxlen=None, approximate=True,
         fields: dict of field/value pairs to insert into the stream
         id: Location to insert this record. By default it is appended.
         maxlen: truncate old stream members beyond this size.
-        Can't be specify with minid.
-        minid: the minimum id in the stream to query.
-        Can't be specify with maxlen.
+        Can't be specified with minid.
         approximate: actual stream length may be slightly more than maxlen
         nomkstream: When set to true, do not make a stream
+        minid: the minimum id in the stream to query.
+        Can't be specified with maxlen.
         limit: specifies the maximum number of entries to retrieve
         """
         pieces = []
         if maxlen is not None and minid is not None:
-            raise DataError("Only one of ```maxlen``` or ```minid```",
+            raise DataError("Only one of ```maxlen``` or ```minid``` "
                             "may be specified")
 
         if maxlen is not None:
@@ -2201,8 +2201,10 @@ def xtrim(self, name, maxlen=None, approximate=True, minid=None,
         Trims old messages from a stream.
         name: name of the stream.
         maxlen: truncate old stream messages beyond this size
+        Can't be specified with minid.
         approximate: actual stream length may be slightly more than maxlen
         minid: the minimum id in the stream to query
+        Can't be specified with maxlen.
         limit: specifies the maximum number of entries to retrieve
         """
         pieces = []