Allow trailing whitespace in ignore comments

[PeterStolz]

• This is a bug report
• This is a feature request
• I searched existing issues before opening this one

Expected behavior

Not sure if this is a bug, so I opened as a feature request. I would expect the ignore rules to strip/ignore trailing whitespaces.

Actual behavior

# hadolint ignore=DL3029 ignores the rules whereas # hadolint ignore=DL3029 does not.
I know there is no particular reason to have a trailing whitespace at the end of a comment, but it took me a bit to figure it out.

Steps to reproduce the behavior

Run hadolint on this dockerfile

FROM busybox
# hadoling ignore=DL3003
RUN cd /
# hadoling ignore=DL3003 
RUN cd /

In my opinion there should be 2 DL3003 warnings, but there is only one.

Output of hadolint --version or
docker run --rm hadolint/hadolint hadolint --version or
docker run --rm ghcr.io/hadolint/hadolint hadolint --version:

Haskell Dockerfile Linter 2.12.0

Dockerfile (if relevant)
see above