Suggested changes + fixes from swift run

Author: KarolinaGroszewska

CodeGeneration/Sources/SyntaxSupport/AttributeNodes.swift

@@ -199,8 +199,8 @@ public let ATTRIBUTE_NODES: [Node] = [
       Child(
         name: "platformVersion",
         deprecatedName: "availabilityVersionRestriction",
-        documentation: "The platform/version pair, e.g. `iOS 10.1`",
-        kind: .node(kind: .platformVersion)
+        kind: .node(kind: .platformVersion),
+        documentation: "The platform/version pair, e.g. `iOS 10.1`"
       ),
       Child(
         name: "trailingComma",
@@ -286,12 +286,12 @@ public let ATTRIBUTE_NODES: [Node] = [
       Child(
         name: "witnessMethodLabel",
         kind: .token(choices: [.keyword(.witness_method)]),
-        documentation: "The \"witnessMethod\" label."
+        documentation: #"The "witnessMethod" label."#
       ),
       Child(
         name: "colon",
         kind: .token(choices: [.token(.colon)]),
-        documentation: "The colon separating the \"witnessMethod\" label and the original protocol name."
+        documentation: #"The colon separating the "witnessMethod" label and the original protocol name."#
 
       ),
       Child(
@@ -464,7 +464,7 @@ public let ATTRIBUTE_NODES: [Node] = [
         name: "arguments",
         deprecatedName: "diffParams",
         kind: .node(kind: .differentiabilityWithRespectToArgument),
-        documentation: "The differentiability arguments, if any exist.",
+        documentation: "The differentiability arguments, if any exists.",
         isOptional: true
       ),
       Child(