Get bundle exec respecting proc titles

lib/bundler/cli/exec.rb

@@ -27,12 +27,7 @@ def run
         if !Bundler.settings[:disable_exec_load] && ruby_shebang?(bin_path)
           return kernel_load(bin_path, *args)
         end
-        # First, try to exec directly to something in PATH
-        if Bundler.current_ruby.jruby_18?
-          kernel_exec(bin_path, *args)
-        else
-          kernel_exec([bin_path, cmd], *args)
-        end
+        kernel_exec(bin_path, *args)
       else
         # exec using the given command
         kernel_exec(cmd, *args)

spec/commands/exec_spec.rb

@@ -55,6 +55,17 @@
     expect(out).to eq("hi")
   end
 
+  it "respects custom process title when loading through ruby" do
+    script_that_changes_its_own_title_and_checks_if_picked_up_by_ps_unix_utility = <<~RUBY
+      Process.setproctitle("1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16")
+      puts `ps -eo args | grep [1]-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16`
+    RUBY
+    create_file "Gemfile"
+    create_file "a.rb", script_that_changes_its_own_title_and_checks_if_picked_up_by_ps_unix_utility
+    bundle "exec ruby a.rb"
+    expect(out).to eq("1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16")
+  end
+
   it "accepts --verbose" do
     install_gemfile 'gem "rack"'
     bundle "exec --verbose echo foobar"