Applied review comments

Author: nickolas-pohilets

Sources/SwiftParser/Declarations.swift

@@ -1145,7 +1145,7 @@ extension Parser {
     var unexpectedAfterAsync: [RawSyntax?] = []
     /// Only allow recovery to the arrow with exprKeyword precedence so we only
     /// skip over misplaced identifiers and don't e.g. recover to an arrow in a 'where' clause.
-    if self.at(.arrow) || self.canRecoverTo(TokenSpec(.arrow, recoveryPrecedence: .exprKeyword)) != nil {
+    if self.canRecoverTo(TokenSpec(.arrow, recoveryPrecedence: .exprKeyword)) != nil {
       let output = self.parseFunctionReturnClause(effectSpecifiers: &effectSpecifiers, allowNamedOpaqueResultType: true)
       unexpectedAfterAsync.append(RawSyntax(output))
     }

Sources/SwiftParser/Specifiers.swift

@@ -527,7 +527,11 @@ extension RawDeinitEffectSpecifiersSyntax: RawMisplacedEffectSpecifiersTrait {
     throwsSpecifier: RawTokenSyntax?,
     arena: __shared SwiftSyntax.SyntaxArena
   ) {
-    // Inserted missing throws is discarded
+    // `throwsSpecifier` should never be present because `parseMisplacedEffectSpecifiers()` only creates missing tokens
+    // and `CorrectThrowsTokenKinds` is an empty `TokenSpecSet`.
+    //
+    // We don't want to insert missing `throws` for deinit case,
+    // so if `parseMisplacedEffectSpecifiers()` creates one it will be discarded here.
     precondition(throwsSpecifier?.isMissing ?? true)
     self.init(
       nil,
@@ -540,7 +544,11 @@ extension RawDeinitEffectSpecifiersSyntax: RawMisplacedEffectSpecifiersTrait {
   func withMisplaced(async misplacedAsyncKeyword: RawTokenSyntax?, throws misplacedThrowsKeyword: RawTokenSyntax?, arena: SyntaxArena)
     -> RawDeinitEffectSpecifiersSyntax
   {
-    // Inserted missing throws is discarded
+    // `throwsSpecifier` should never be present because `parseMisplacedEffectSpecifiers()` only creates missing tokens
+    // and `CorrectThrowsTokenKinds` is an empty `TokenSpecSet`.
+    //
+    // We don't want to insert missing `throws` for deinit case,
+    // so if `parseMisplacedEffectSpecifiers()` creates one it will be discarded here.
     precondition(throwsSpecifier?.isMissing ?? true)
     return Self.init(
       self.unexpectedBeforeAsyncSpecifier,