changed formatting

INSTALL_PREBUILT_BINARY.md

@@ -20,14 +20,14 @@ Ubuntu 20.04.2
 ~~~
 
 
-for all, the following is appicable:
-
-### 1 mkdir -p ~/src/build 
-### 2 cd ~/src/build 
-### 3 wget https://wfview.org/downloads/latest.tar.gz   (filepath/name tbd -- currently: mail roeland, pa3met for files)
-### 4 tar zxvf latest.tar.gz
-### 5 sudo ./install.sh
-
+### for all, the following is appicable:
+~~~
+### mkdir -p ~/src/build 
+### cd ~/src/build 
+### wget https://wfview.org/downloads/latest.tar.gz   (filepath/name tbd -- currently: mail roeland, pa3met for files)
+### tar zxvf latest.tar.gz
+### sudo ./install.sh
+~~~
 this will install the binary and a few other files to your system.