License header ignores skip lines when using git history

[trajano]

If you are submitting a bug, please include the following:

• summary of problem

-DspotlessSetLicenseHeaderYearsFromGitHistory=true with maven spotless:apply

<shell>
                  <includes>
                    <include>**/*.sh</include>
                  </includes>
                  <excludes>
                    <exclude>**/node_modules/**</exclude>
                  </excludes>
                  <trimTrailingWhitespace/>
                  <endWithNewline/>
                  <licenseHeader>
                    <content># (c)$YEAR XXX</content>
                    <skipLinesMatching>^#!/.+?$</skipLinesMatching>
                    <delimiter>[\n]|set</delimiter>
                  </licenseHeader>
</shell>

Given an existing file with

#!/bin/sh
# (c) 2024 XXXX
set -e

updating the file with the retroactive dates drops the shebang

# (c) 2000-2024 XXXX
set -e

• Gradle or Maven version
  maven

• spotless version
  2.43.0

• operating system and version
  windows

• copy-paste your full Spotless configuration block(s), and a link to a public git repo that reproduces the problem if possible

• copy-paste the full content of any console errors emitted by gradlew spotless[Apply/Check] --stacktrace

If you're just submitting a feature request or question, no need for the above.

[nedtwigg]

• Closing as dupe of Shebang Removal While Adding Copyright Header in Shell Scripts #2270