test: tighten node_10_spec EOL warning assertion to match full message

Author: colincasey

spec/ci/node_10_spec.rb

@@ -8,7 +8,16 @@
 
     it "should deploy successfully with EOL warning" do
       app.deploy do |app|
-        expect(app.output).to include("End-of-Life")
+        expect(clean_output(app.output)).to include(<<~OUTPUT)
+          remote:        !     Node.js 10.24.1 is now End-of-Life (EOL). It no longer receives security
+          remote:        !     updates, bug fixes, or support from the Node.js project and is no longer
+          remote:        !     supported on Heroku.
+          remote:        !
+          remote:        !     In a future buildpack release, this warning will become a build error. Please
+          remote:        !     upgrade to a supported version as soon as possible to avoid build failures.
+          remote:        !
+          remote:        !     https://devcenter.heroku.com/articles/nodejs-support#supported-node-js-versions
+        OUTPUT
         expect(successful_body(app).strip).to eq("Hello, world!")
       end
     end

spec/spec_helper.rb

@@ -42,6 +42,12 @@ def successful_json_body(app, options = {})
   JSON.parse(body)
 end
 
+def clean_output(output)
+  output
+    .gsub(/\e\[[0-9;]+m/, '')
+    .gsub(/ {8}(?=\R)/, '')
+end
+
 def run!(cmd)
   out = `#{cmd}`
   raise "Error running command #{cmd.inspect}: #{out}" unless $?.success?