message: Fix failing snapshot tests
diff: @@ -315,7 +315,11 @@ exports[`Swift code generation #classDeclarationForOperation() should generate a
  public let operationName: String = \\"Hero\\"
  - public var queryDocument: String { return operationDefinition.appending(\\"\\\\n\\" + HeroDetails.fragmentDefinition) }
  + public var queryDocument: String {
  + var document: String = operationDefinition
  + document.append(\\"\\\\n\\" + HeroDetails.fragmentDefinition)
  + return document
  + }
  public init() {
  }
  @@ -460,7 +464,11 @@ exports[`Swift code generation #classDeclarationForOperation() should generate a
  public let operationName: String = \\"Hero\\"
  - public var queryDocument: String { return operationDefinition.appending(\\"\\\\n\\" + DroidDetails.fragmentDefinition) }
  + public var queryDocument: String {
  + var document: String = operationDefinition
  + document.append(\\"\\\\n\\" + DroidDetails.fragmentDefinition)
  + return document
  + }
  public init() {
  }
  @@ -633,7 +641,11 @@ exports[`Swift code generation #classDeclarationForOperation() should generate a
  public let operationName: String = \\"Hero\\"
  - public var queryDocument: String { return operationDefinition.appending(\\"\\\\n\\" + HeroDetails.fragmentDefinition) }
  + public var queryDocument: String {
  + var document: String = operationDefinition
  + document.append(\\"\\\\n\\" + HeroDetails.fragmentDefinition)
  + return document
  + }
  public init() {
  }
  @@ -834,7 +846,11 @@ exports[`Swift code generation #classDeclarationForOperation() should generate a
  public let operationIdentifier: String? = \\"90d0d674eb6a7b33776f63200d6cec3d09f881247c360a2ac9a29037a02210c4\\"
  - public var queryDocument: String { return operationDefinition.appending(\\"\\\\n\\" + HeroDetails.fragmentDefinition) }
  + public var queryDocument: String {
  + var document: String = operationDefinition
  + document.append(\\"\\\\n\\" + HeroDetails.fragmentDefinition)
  + return document
  + }
  public init() {
  }
  