Remove useless cat from setup (#717)

setup.sh

@@ -4,7 +4,7 @@ set -ex
 # If we are a root in a Docker container and `sudo` doesn't exist
 # lets overwrite it with a function that just executes things passed to sudo
 # (yeah it won't work for sudo executed with flags)
-if [ -f /.dockerenv ]  && ! hash sudo 2>/dev/null && whoami | grep root; then
+if [ -f /.dockerenv ] && ! hash sudo 2>/dev/null && whoami | grep root; then
     sudo() {
         $*
     }
@@ -48,7 +48,7 @@ else
 fi
 
 if linux; then
-    distro=$(cat /etc/os-release | grep "^ID=" | cut -d\= -f2 | sed -e 's/"//g')
+    distro=$(grep "^ID=" /etc/os-release | cut -d'=' -f2 | sed -e 's/"//g')
 
     case $distro in
         "ubuntu")