Format fix 2005/jetro/README.md

I also removed the information on how to install SDL and referred
(linked) to the faq which has the information instead. It seems better
to just have a note about it being needed and then referring to the faq
rather than lengthening each README.md file by explaining how to do it.
Perhaps this is not the right way to go about it but that can be decided
later.

2005/jetro/README.md

@@ -1,9 +1,8 @@
 # Most sonorous output
 
-    Jetro Lauha
-    Talonpojantie 5A9,
-    00790 Helsinki
-    <http://jet.ro>
+Jetro Lauha  
+Finland  
+<http://jet.ro>  
 
 ## To build:
 
@@ -13,60 +12,8 @@ This entry requires SDL to be installed.
 make
 ```
 
-### To install SDL and SDL2:
-
-#### macOS users
-
-If you have not aleady do so, install Homebrew.  See the following for information:
-
-    https://brew.sh
-
-Then to install SDL and SDL2, execute the following command:
-
-```sh
-brew install sdl2 sdl12-compat
-eval "$(/opt/homebrew/bin/brew shellenv)"
-```
-
-#### Linux users:
-
-To install SDL and SDL2, execute the following command as root:
-
-```sh
-dnf install SDL2 SDL2-devel sdl12-compat sdl12-compat-devel
-```
-
-Use make as follows:
-
-```sh
-make ... SDL2_INCLUDE_ROOT=/usr
-```
-
-or set the following environment variable:
-
-```sh
-export SDL2_INCLUDE_ROOT=/usr
-```
-
-#### Debian users
-
-To install SDL and SDL2, execute the following command as root:
-
-```sh
-apt install libsdl1.2debian libsdl1.2-dev libsdl2-dev
-```
-
-Use make as follows:
-
-```sh
-make ... SDL2_INCLUDE_ROOT=/usr
-```
-
-or set the following environment variable:
-
-```sh
-export SDL2_INCLUDE_ROOT=/usr
-```
+See the [faq](/faq.md) for information on how to install it if you haven't
+already.
 
 ## To run: