Doc link fixes

README.md

 
 ## Setup
 
-See main document, [docs/setup.md](Setup).
+See main document, [Setup](docs/setup.md).
 
 In brief, the full setup process is:
 - create a Discord application in their developer portal
 
 ## Usage
 
-See main document, [docs/commands.md](Commands).
+See main document, [Commands](docs/commands.md).
 
 * To see the list of commands, type `/help`.
 * To get help on a specific command, type `/help /commandname`. E.g. `/help /hello`.

docs/commands.md

 exactly the same as the URL, this happens in benign circumstances often enough
 that users may ignore it. Discord prevents posting mismatching URLs like
 `[https://goodsite.com](https://badsite.com)`, however it doesn't prevent posting
-things that are URL-like, like `[goodsite.com](https://badsite.com)` (without
+things that are URL-like, e.g. `[goodsite.com](https://badsite.com)` (without
 the `https://`). Our deceptive link detection catches these URL-like link labels.
 
 Subcommands