Allow Miri a bit longer to respond

Author: shepmaster

tests/spec/features/tools_spec.rb

@@ -44,7 +44,8 @@ def code_with_lint_warnings
     in_tools_menu { click_on("Miri") }
 
     within(".output-stderr") do
-      expect(page).to have_content %r{pointer must be in-bounds at offset 1, but is outside bounds of alloc\d+ which has size 0}
+      expect(page).to have_content %r{pointer must be in-bounds at offset 1, but is outside bounds of alloc\d+ which has size 0}, wait: 10
+
     end
   end