fix: conform articles to the template

knowledge base/1password-cli.md

@@ -1,19 +1,26 @@
 # 1password-cli
 
+## Table of contents <!-- omit in toc -->
+
+1. [TL;DR](#tldr)
+1. [Gotchas](#gotchas)
+1. [Further readings](#further-readings)
+1. [Sources](#sources)
+
 ## TL;DR
 
 ```sh
 # installation
-brew cask install 1password-cli
+brew install --cask '1password-cli'
 
 # first login
-op signin company.1password.com user.name@company.com
+op signin 'company.1password.com' 'user.name@company.com'
 # subsequent logins
-op signin company
+op signin 'company'
 
 # automatically set environment variables
 # needed to run the export command manually
-eval $(op signin company)
+eval "$(op signin 'company')"
 
 # show all the items in the account
 op list items
@@ -24,7 +31,7 @@ op list items
 - After you have signed in the first time, you can sign in again using your account shorthand, which is your sign-in address subdomain (in this example, _company_); `op signin` will prompt you for your password and output a command that can save your session token to an environment variable:
 
   ```sh
-  op signin company
+  op signin 'company'
   ```
 
 - Session tokens expire after 30 minutes of inactivity, after which you'll need to sign in again
@@ -33,10 +40,19 @@ op list items
 
 - [CLI guide]
 
-[cli guide]: https://support.1password.com/command-line/
 
 ## Sources
 
+All the references in the [further readings] section, plus the following:
+
 - [CLI getting started] guide
 
+<!-- project's references -->
 [cli getting started]: https://support.1password.com/command-line-getting-started/
+[cli guide]: https://support.1password.com/command-line/
+
+<!-- in-article references -->
+[further readings]: #further-readings
+
+<!-- internal references -->
+<!-- external references -->