just tiny typo (grammar)

[Hearen]

Signed-off-by: Hearen [email protected]

Which issue(s) this PR fixes:
Fixes # just tiny typo (grammar)

What this PR does / why we need it:

Docs Changes: no

Release Note: no

[Hearen]

@cosmo0920 Sorry for the inconvenience, just signed.

[repeatedly]

Please fix tests. test_filter_parser.rb checks error message.

In addition, don't open new PR for commit fix. Use git push -f for in-place commit update.
Lots of same PR are messy for repository search.

[Hearen]

@repeatedly Good morning ;)

Sorry my bad, I knew how to do that. The old one is done in page directly while the second in my PC. I will avoid that, sorry for the inconvenience.

[Hearen]

@repeatedly It seems it's still not passing the tests after updating the test_filter_parser.rb, is there anything I missed out? Sorry to ask this but I got confused now.

Locally I tested it with 100% passed

.............................................................
........................................................................
Finished in 1065.899145476 seconds.
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2893 tests, 11518 assertions, 0 failures, 0 errors, 0 pendings, 0 omissions, 1 notifications
100% passed
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2.71 tests/s, 10.81 assertions/s
hearen@hearen-pc:~/git/personal/fluentd(typo-fix)$ bundle exec rake test

[repeatedly]

This will be merged when release v1.5.0. Error message change is not trivial fix for users.

[repeatedly]

Next release is 1.5.0 so merged.