Sam Brannen
41f35ef6b3
Historically, we have used `<introduction year>-<modification year>` as
the pattern for copyright headers.
For example: `Copyright 2002-2025 the original author or authors.`
However, we have been encouraged to use `present` as the modification
year.
In light of that, this commit updates the following to enforce the new
pattern.
- The patterns in our SpringHeaderCheck Checkstyle rules
- The `Copyright 2002-${year}` template in org.eclipse.jdt.ui.prefs
- The update_copyright_headers.sh script
See gh-35070
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