Add basic pre-commit rules

.pre-commit-config.yaml

@@ -0,0 +1,9 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.4.0
+    hooks:
+      - id: trailing-whitespace
+        exclude_types: [markdown]
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files

data/plugins/official/dice.yaml

@@ -6,4 +6,3 @@ description: A combined dice rolling and calculator bot.
 public_instances:
   - "@dice:maunium.net"
   - "@dice:t2bot.io"
-

data/plugins/official/echo.yaml

@@ -4,7 +4,7 @@ license: MIT
 author: Tulir
 description: |
   A bot that echoes pings and other stuff.
-  
+
   See [#ping:maunium.net](https://matrix.to/#/#ping:maunium.net) for a room
   with lots of echo bots.
 public_instances:

data/plugins/official/factorial.yaml

@@ -6,4 +6,3 @@ description: A bot to calculate unexpected factorials.
 public_instances:
   - "@factorial:maunium.net"
   - "@factorial:t2bot.io"
-

data/plugins/thirdparty/gifme.yaml

@@ -3,7 +3,7 @@ repo: https://github.com/williamkray/maubot-gifme
 license: MIT
 author: William Kray
 description: |
-  Superior gif responses. Save your own library of image or video responses. 
+  Superior gif responses. Save your own library of image or video responses.
   Allows fallback behavior to Giphy or Tenor, optionally saves quotes from
   users for comedic effect or to be used as an FAQ bot!
 public_instances: []

data/plugins/thirdparty/reminder-agenda.yaml

@@ -7,7 +7,7 @@ license: AGPL-3.0-or-later
 # The author of the plugin.
 author: Ruby Marx
 # A short description for the plugin. May contain markdown.
-description: Create reminders, recurring reminders, and agenda items. A maubot port of [matrix-reminder-bot](https://github.com/anoadragon453/matrix-reminder-bot/tree/master) combined with [maubot/reminder](https://github.com/maubot/reminder) 
+description: Create reminders, recurring reminders, and agenda items. A maubot port of [matrix-reminder-bot](https://github.com/anoadragon453/matrix-reminder-bot/tree/master) combined with [maubot/reminder](https://github.com/maubot/reminder)
 # Antifeature identifiers. Currently the only defined value is `synchronous`,
 # which must be included if the plugin uses non-async libraries in the main
 # thread (because that can block the whole maubot process).

static/index.css

@@ -53,7 +53,7 @@ body > header {
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 4;
-   line-clamp: 4; 
+   line-clamp: 4;
    -webkit-box-orient: vertical;
 }