Fix enum member trait parsing

The clearPendingDocs call was made after consuming traits that follow
a previous enum member. Fixed by calling it in the right order.

smithy-model/src/main/java/software/amazon/smithy/model/loader/IdlModelParser.java

@@ -621,11 +621,11 @@ final class IdlModelParser extends SimpleParser {
                 sp();
                 Node value = IdlNodeParser.parseNode(this);
                 memberBuilder.addTrait(new EnumValueTrait.Provider().createTrait(memberBuilder.getId(), value));
+                clearPendingDocs();
                 br();
+            } else {
+                ws();
             }
-
-            clearPendingDocs();
-            ws();
         }
 
         expect('}');

smithy-model/src/test/resources/software/amazon/smithy/model/loader/valid/enums/enum-docs.json

@@ -0,0 +1,24 @@
+{
+    "smithy": "2.0",
+    "shapes": {
+        "smithy.example#Foo": {
+            "type": "enum",
+            "members": {
+                "BAR": {
+                    "target": "smithy.api#Unit",
+                    "traits": {
+                        "smithy.api#documentation": "Hello1",
+                        "smithy.api#enumValue": "hi"
+                    }
+                },
+                "BAZ": {
+                    "target": "smithy.api#Unit",
+                    "traits": {
+                        "smithy.api#documentation": "Hello2",
+                        "smithy.api#enumValue": "there"
+                    }
+                }
+            }
+        }
+    }
+}

smithy-model/src/test/resources/software/amazon/smithy/model/loader/valid/enums/enum-docs.smithy

@@ -0,0 +1,10 @@
+$version: "2.0"
+namespace smithy.example
+
+enum Foo {
+    /// Hello1
+    BAR = "hi"
+
+    /// Hello2
+    BAZ = "there"
+}