Whole-project `flutter analyze` exited 1 on 17 pre-existing info/warning
lints (no errors) in dev tools and test files. Clean them so analyze is
green:
- editor_repository_test: drop the redundant sqflite_common import; keep
the used utils import with a transitive-dep ignore.
- pen_* widget tests: `(_, __)` wildcard params -> `(_, _)`.
- search_snippet_test / gen_bench_pdf / gen_dense_strokes: drop needless
interpolation braces; remove an unused `Size` show and an unused local;
mark the gen tool as print-allowed.
No runtime behavior changed. flutter analyze: No issues found. Affected
tests: 22/22 pass.
Device-independent pinch test over PenCanvas: a steady two-finger spread must
grow the shared transform scale MONOTONICALLY, with no frame popping above the
final scale and snapping back (the flicker invariant the absolute-from-snapshot
rewrite enforces). Plus: a single stylus drag never pans/zooms (the recognizer
excludes stylus) — the transform stays identity while the pen draws.
Locks in 6829076 + the arbiter exclusion as regressions guards without a device.
flutter analyze lib/editor clean; 235/235 tests (+2 widget).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
