Merge pull request #65 from grosser/grosser/docs2

fix short backtrace docs

Gemfile

@@ -2,4 +2,4 @@ source "https://rubygems.org"
 gemspec
 
 gem "debug"
-gem "bump" # does not work on old ruby versions -> not run on travis
+gem "bump"

spec/maxitest_spec.rb

@@ -50,16 +50,23 @@
   end
 
   it "shows short backtraces" do
-    # Ruby 3.2 has a different backtrace it add 2 lines
-    # between the lib/maxitest/timeout.rb
-    # and the spec/cases/raise.rb
-    # In Minitest 5.20.0+ the backtrace is more verbose
     out = run_cmd("ruby spec/cases/raise.rb", fail: true)
+
+    # Ruby 3.2 has a different backtrace it add 2 lines between the lib/maxitest/timeout.rb
+    # and the spec/cases/raise.rb
     out.gsub!(/\n.*previous definition of Timeout.*/, "")
+
+    # unify backtraces between ruby versions
     output_in = out.gsub!(/:in .*/, "")
 
     output_in.should include "TypeError: Timeout is not a module"
     output_in.should include 'spec/cases/raise.rb:11'
+
+    # Minitest 5.21.0+ backtrace is more verbose and the short backtrace feature seems to be gone
+    # re-test by running spec/cases/raise.rb and only loading minitest/autorun and not maxitest
+    if Minitest::VERSION <= "5.21.0"
+      output_in.should_not include 'lib/maxitest'
+    end
   end
 
   it "has helpers" do