Apply suggestions from code review

Author: IgnisRBX

content/en-us/reference/engine/classes/TextChannel.yaml

@@ -293,21 +293,23 @@ callbacks:
       returns anything else (including `nil`), the message won't be delivered to
       that client, although the sender will see the message regardless.
 
-      The sender can be referenced by `Class.TextChatMessage.TextSource`. The 
-      receiver is the `textSource` argument. Note that the sender and receiver
-      can be the same, as the callback iterates through all possible receivers.
-      In Roblox Studio, you will be the only sender and recipient of a message
-      while in Play Solo mode.
+      The sender can be referenced by `Class.TextChatMessage.TextSource`,
+      while the receiver is the `textSource` argument. Note that the sender
+      and receiver can be the same, as the callback iterates through all possible
+      receivers. In Roblox Studio, you will be the only sender and recipient of a
+      message while in solo **Play** mode.
     code_samples: []
     parameters:
       - name: message
         type: TextChatMessage
         default:
-        summary: 'The message being sent, which also contains the sender of the message.'
+        summary: |
+          The message being sent, which also contains the sender of the message.
       - name: textSource
         type: TextSource
         default:
-        summary: 'The `Class.TextSource` of the user who will be receiving the message.'
+        summary: |
+          The `Class.TextSource` of the user who will be receiving the message.
     returns:
       - type: Tuple
         summary: ''