💬 Update Slack literal (#22)

Update literals

.flake8

@@ -1,2 +1,2 @@
 [flake8]
-max-line-length=120
+max-line-length=180

pyproject.toml

@@ -1,5 +1,5 @@
 [tool.pylint.'MESSAGES CONTROL']
-max-line-length = 120
+max-line-length = 180
 disable = """
     import-error,
     missing-function-docstring,

src/var/task/handler.py

@@ -101,9 +101,7 @@ def handler(event, context):  # pylint: disable=unused-argument
             # the transfer Lambda
             # e.g, "transferred,{supplier}/{file_name},{timestamp}"
             message = event["Records"][0]["Sns"]["Message"]
-            state, object_key, timestamp = message.split(  # pylint: disable=unused-variable
-                ","
-            )
+            state, object_key, timestamp = message.split(",")  # pylint: disable=unused-variable
             supplier, file_name = object_key.split("/")[:2]
             supplier_config = supplier_configuration(supplier=supplier)
 
@@ -124,10 +122,10 @@ def handler(event, context):  # pylint: disable=unused-argument
             if supplier_config[2]:
                 send_slack(
                     slack_channel=supplier_config[2],
-                    message=f"File {file_name} from {supplier} has been transferred to {supplier_config[3]}.",
+                    message=f"A file uploaded by `{supplier}` has been transferred to `{supplier_config[3]}`.\n - `{file_name}`",
                 )
             else:
-                print(f"No Slack channel configured for {supplier}")
+                print(f"No Slack channel configured for `{supplier}`")
 
         else:
             raise ValueError(f"Invalid mode: {mode}")