PLUGINS.md: General PyCharm alerts pass

A few bits of example code tweaked to be more correct, but to make
PyCharm truly happy about the file we'd need to expand the examples to
stupid proportions (extra imports, indent changes etc).

PLUGINS.md

@@ -130,6 +130,7 @@ Insert this at the top-level of your load.py file (so not inside
 
 ```python
 import logging
+import os
 
 from config import appname
 
@@ -323,9 +324,9 @@ should treat it as a variable.
 **Do NOT use**:
 
 ```python
-   from config import shutting_down
+   from config import config
 
-    if shutting_down():
+    if config.shutting_down:
        # During shutdown
 ```
 
@@ -398,7 +399,6 @@ as in the code below.
 
 ```python
 import tkinter as tk
-from tkinter import ttk
 import myNotebook as nb
 from config import config
 from typing import Optional
@@ -468,7 +468,7 @@ def plugin_app(parent: tk.Frame) -> Tuple[tk.Label, tk.Label]:
     global status
     label = tk.Label(parent, text="Status:")  # By default widgets inherit the current theme's colors
     status = tk.Label(parent, text="", foreground="yellow")  # Override theme's foreground color
-    return (label, status)
+    return label, status
 
 # later on your event functions can update the contents of these widgets
 def some_other_function() -> None:
@@ -493,7 +493,7 @@ You can dynamically add and remove widgets on the main window by returning a
 of that frame.
 
 ```python
-from typing import Option
+from typing import Optional
 import tkinter as tk
 
 from theme import theme
@@ -803,8 +803,6 @@ before returning from this function.
 ### Player Dashboard
 
 ```python
-import plug
-
 def dashboard_entry(cmdr: str, is_beta: bool, entry: Dict[str, Any]):
     is_deployed = entry['Flags'] & edmc_data.FlagsHardpointsDeployed
     sys.stderr.write("Hardpoints {}\n".format(is_deployed and "deployed" or "stowed"))
@@ -916,9 +914,7 @@ def inara_notify_ship(event_data):
     `event_data` holds the response to an addCommanderShip or setCommanderShip event https://inara.cz/inara-api-docs/#event-11
     """
     if event_data.get('shipInaraID'):
-        logger.info(
-            f'Now in Inara ship {event_data['shipInaraID'],} at {event_data['shipInaraURL']}
-        )
+        logger.info(f'Now in Inara ship {event_data["shipInaraID"],} at {event_data["shipInaraURL"]}')
 ```
 
 If the player has chosen to "Send flight log and Cmdr status to Inara" this