adding comments to the different sections of the code

LogBot/logbot.py

@@ -172,7 +172,7 @@ class Logbot(Bot):
         self.log.info(f"sender: { message.sender }")
         self.log.info("------------------")
 
-        # image / PDF / audio / video
+        # Response to files: image / PDF / audio / video
         if message.url:
             media_post, media_type = self._download(message)
             if media_post:
@@ -182,10 +182,12 @@ class Logbot(Bot):
             else:
                 reply = "Sorry, can't process that :( (unknown media type?)"
 
+        # Response to @add
         elif "@add" in message.text:
             self._add_to_db(message)
             reply = "Added, thanks!"
 
+        # Response to @delete
         elif "@delete" in message.text:
             match = re.findall(r"@delete \d*", message.content)[0]
             key = str(match.replace("@delete ", ""))
@@ -199,12 +201,14 @@ class Logbot(Bot):
             else:
                 reply = "This message is already gone!"
 
+        # Response to @title
         elif "@title" in message.text:
             match = re.findall("@title .*", message.content)[0]
             title = match.replace("@title", "")
             self.db[message.room]["title"] = title
             reply = f"The title of the log is changed to: { title }"
 
+        # Response to @style
         elif "@style" in message.text:
             reply = "This is a future-feature ..."