[ros2-setup] fix grep

Author: MatthijsBurgh

ros2-setup/install.bash

@@ -25,11 +25,12 @@ then
         needs_enabling_universe=false
     fi
 else
-    if ! grep -h ^deb /etc/apt/sources.list 2>/dev/null | grep "${ubuntu_name} (?:[a-z ]*(?:[a-z]+(?: [a-z]+)*)) universe" -q
+    if ! grep -h ^deb /etc/apt/sources.list 2>/dev/null | grep -P "${ubuntu_name}[a-z\-]* (?:[a-z ]*(?:[a-z]+(?: [a-z]+)*)) universe" -q
     then
         tue-install-debug "No universe found in the sources.list, going to enable the universe repository"
     else
         tue-install-debug "Universe found in the sources.list, no need to enable it"
+        needs_enabling_universe=false
     fi
 fi