Fix return code propagation of checks

utils/clippy_all.rb

@@ -15,7 +15,10 @@ def clippy_all
 
         Dir.chdir(x) do
             puts "Clippy: #{x}"
-            system('make clippy')
+            unless system('make clippy')
+                puts "\n\nClippy failed!"
+                exit(1) # Exit with error code
+            end
         end
     end
 end

utils/fmt_all.rb

@@ -21,7 +21,10 @@ def fmt_all(check = false)
 
         Dir.chdir(x) do
             puts "Format #{x}"
-            system("cargo fmt #{args}")
+            unless system("cargo fmt #{args}")
+                puts "\n\nFmt check failed!"
+                exit(1) # Exit with error code
+            end
         end
     end
 end