Fix unsafe keyword dot-spacing edge case (#2513)

Sources/Rules/SpaceAroundOperators.swift

@@ -63,6 +63,8 @@ public extension FormatRule {
                 switch formatter.tokens[prevIndex] {
                 case .operator(_, .infix), .startOfScope:
                     return
+                case let token where [.identifier("unsafe")].contains(token):
+                    return // `unsafe` is contextual, so leave existing spacing unchanged.
                 case let token where token.isUnwrapOperator:
                     if let prevToken = formatter.last(.nonSpace, before: prevIndex),
                        [.keyword("as"), .keyword("try")].contains(prevToken)

Tests/Rules/SpaceAroundOperatorsTests.swift

@@ -54,6 +54,20 @@ final class SpaceAroundOperatorsTests: XCTestCase {
         testFormatting(for: input, rule: .spaceAroundOperators)
     }
 
+    func testSpacePreservedBetweenUnsafeAndDot() {
+        let input = """
+        unsafe .foo
+        """
+        testFormatting(for: input, rule: .spaceAroundOperators)
+    }
+
+    func testNoSpaceAddedBetweenUnsafeAndDot() {
+        let input = """
+        unsafe.foo
+        """
+        testFormatting(for: input, rule: .spaceAroundOperators)
+    }
+
     func testSpaceBetweenOptionalAndDefaultValueInFunction() {
         let input = """
         func foo(bar _: String?=nil) {}