Tighten help listing assertion and adjust chomp

Signed-off-by: Clinton Wolfe <clintoncwolfe@gmail.com>

lib/inspec/input_registry.rb

@@ -158,7 +158,7 @@ module Inspec
         end
         input_name, input_value = pair.split("=")
         evt = Inspec::Input::Event.new(
-          value: input_value.sub(/,$/, ""), # Trim trailing comma if any
+          value: input_value.chomp(","), # Trim trailing comma if any
           provider: :cli,
           priority: 50
         )

test/functional/inputs_test.rb

@@ -46,9 +46,7 @@ describe "inputs" do
 
     it "includes the --input option" do
       result = run_inspec_process("exec help", lock: true) # --no-create-lockfile option breaks usage help
-      lines = result.stdout.lines
-      line = lines.detect { |l| l.include? "--input" }
-      line.wont_be_nil
+      assert_match(/--input\s/, result.stdout) # Careful not to match --input-file
     end
   end