Fix a miss spell

This change addresses the 2nd issue reported in #633. The previous attempt
in commit b0fd0d4 was intended to fix this, but it has a regression.
This change resolves the issue without introducing any regressions.

Examples/Samples/Sources/UseCases/UseCaseController.swift

@@ -202,10 +202,10 @@ extension UseCaseController {
             fpc.set(contentViewController: contentVC)
             fpc.delegate = self
 
-            let apprearance = SurfaceAppearance()
-            apprearance.cornerRadius = 38.5
-            apprearance.shadows = []
-            fpc.surfaceView.appearance = apprearance
+            let appearance = SurfaceAppearance()
+            appearance.cornerRadius = 38.5
+            appearance.shadows = []
+            fpc.surfaceView.appearance = appearance
             fpc.isRemovalInteractionEnabled = true
 
             let mvc = UIViewController()

Sources/Core.swift

@@ -563,7 +563,7 @@ class Core: NSObject, UIGestureRecognizerDelegate {
     }
 
     private func interruptAnimationIfNeeded() {
-        if let animator = self.moveAnimator, animator.isRunning, 0 <= layoutAdapter.offsetFromMostExpandedAnchor {
+        if let animator = self.moveAnimator, animator.isRunning {
             os_log(msg, log: devLog, type: .debug, "the attraction animator interrupted!!!")
             animator.stopAnimation(true)
             endAttraction(false)
@@ -610,7 +610,7 @@ class Core: NSObject, UIGestureRecognizerDelegate {
         guard
             isScrollable(state: state),  // When not top most(i.e. .full), don't scroll.
             interactionInProgress == false,  // When interaction already in progress, don't scroll.
-            0 == layoutAdapter.offset(from: state),
+            abs(layoutAdapter.offset(from: state)) < 1, // Indistinguishably close to an anchor point.
             !surfaceView.grabberAreaContains(initialLocation)  // When the initial point is within grabber area, don't scroll
         else {
             return false