INSTALL.md: fix list format, remove duplication
@@ -62,9 +62,6 @@ Dendrite requires a postgres database engine, version 9.5 or later.
```bash
sudo -u postgres createuser -P dendrite # prompts for password
```
-
-On macOS, omit `sudo -u postgres`.
-
* Create databases:
```bash
for i in account device mediaapi syncapi roomserver serverkey federationsender publicroomsapi naffka; do
@@ -72,7 +69,7 @@ On macOS, omit `sudo -u postgres`.
done
```
-On macOS, omit `sudo -u postgres`.
+(On macOS, omit `sudo -u postgres` from the above commands.)
### Crypto key generation
