Clean Code for ui/org.eclipse.pde.spy.css

[eclipse-pde-bot]

The following cleanups where applied:

• Add final modifier to private fields
• Add missing '@Deprecated' annotations
• Add missing '@Override' annotations
• Add missing '@Override' annotations to implementations of interface methods
• Convert control statement bodies to block
• Make inner classes static where possible
• Replace deprecated calls with inlined content where possible
• Use pattern matching for instanceof

[github-actions]

Test Results

   273 files   -     8     273 suites   - 8   43m 2s ⏱️ -1s
 3 608 tests ±    0   3 530 ✅  -     1   77 💤 + 1  1 ❌ ±0 
10 628 runs  +2 304  10 453 ✅ +2 337  173 💤  - 34  2 ❌ +1 

For more details on these failures, see this check.

Results for commit bc33a12. ± Comparison against base commit 5d4fd66.

This pull request skips 1 test.

org.eclipse.pde.build.internal.tests.p2.P2Tests ‑ offBug237662

♻️ This comment has been updated with latest results.