doc: remove outdated info, minor touchups

Author: jrouquie

aider/website/assets/sample.aider.conf.yml

@@ -4,10 +4,6 @@
 # Place in your home dir, or at the root of your git repo.
 ##########################################################
 
-# Note: You can only put OpenAI and Anthropic API keys in the YAML
-# config file. Keys for all APIs can be stored in a .env file
-# https://aider.chat/docs/config/dotenv.html
-
 ##########
 # options:
 
@@ -29,6 +25,12 @@
 ## Specify the Anthropic API key
 #anthropic-api-key: xxx
 
+## Specify API key for other providers (eg: --api-key provider=<key> sets PROVIDER_API_KEY=<key>)
+# api-key:
+# - openrouter=sk-or-v1-42424242
+# - deepseek=sk-42424242
+# - ...
+
 ## Specify the api base url
 #openai-api-base: xxx
 
@@ -52,14 +54,6 @@
 #  - yyy
 #  - zzz
 
-## Set an API key for a provider (eg: --api-key provider=<key> sets PROVIDER_API_KEY=<key>)
-#api-key: xxx
-## Specify multiple values like this:
-#api-key:
-#  - xxx
-#  - yyy
-#  - zzz
-
 #################
 # Model settings:
 

aider/website/docs/llms/openrouter.md

@@ -19,6 +19,13 @@ export OPENROUTER_API_KEY=<key> # Mac/Linux
 setx   OPENROUTER_API_KEY <key> # Windows, restart shell after setx
 ```
 
+Alternatively, you may set the API key in the config file ~/.aider.conf.yml , just add the line:
+
+```
+api-key: openrouter=sk-...
+```
+
+
 Start working with aider and OpenRouter on your codebase:
 
 ```bash

aider/website/docs/usage/tips.md

@@ -52,12 +52,12 @@ on the existing information in their contexts.
 
 If your code is throwing an error, 
 use the [`/run` command](commands.html)
-to share the error output with the aider.
-Or just paste the errors into the chat. Let the aider figure out how to fix the bug.
+to share the error output with aider.
+Or just paste the errors into the chat. Let aider figure out how to fix the bug.
 
 If test are failing, use the [`/test` command](lint-test.html)
 to run tests and
-share the error output with the aider.
+share the error output with aider.
 
 ## Providing docs