minor fix

man/fai-cd.8

@@ -163,7 +163,8 @@ CD image to the stick via dd(1).
    # dd if=fai-cd.iso of=/dev/sdf bs=1M
 
 
-\&\fBBuilding a live ISO\fR.
+\&\fBBuilding a live ISO\fR:
+
 You can create a live ISO using two FAI commands. First, you need to build
 your own live environment, containing all software including
 configuration that you like to use. Using the command "fai dirinstall"
@@ -187,7 +188,7 @@ Then create the live ISO:
 
 Hint: The FAI nfsroot is not needed when building a live ISO.
 
-\&\fBMore advanced usage\fR.
+\&\fBMore advanced usage\fR:
 
 It is possible to install over the network without using NFS, i.e. by
 getting the nfsroot via an http request. To do so you have to create a