bugfix: local variable 'data' colliding with argument name

generate/operation.go.tmpl

@@ -36,14 +36,14 @@ func {{.Name}}(
         return nil, {{if .Config.Extensions -}}nil,{{end -}} err
     }
     {{end}}
-    var data {{.ResponseName}}
-    resp := &graphql.Response{Data: &data}
+    var data_ {{.ResponseName}}
+    resp := &graphql.Response{Data: &data_}
 
     err = client.MakeRequest(
         {{if ne .Config.ContextType "-"}}ctx{{else}}nil{{end}},
         req,
         resp,
     )
 
-    return &data, {{if .Config.Extensions -}}resp.Extensions,{{end -}} err
+    return &data_, {{if .Config.Extensions -}}resp.Extensions,{{end -}} err
 }

generate/testdata/queries/MutationArgCalledData.graphql

@@ -0,0 +1,5 @@
+mutation MutationWithDataArg($data: String!) {
+  updateUser(data: $data) {
+    id
+  }
+}

generate/testdata/queries/schema.graphql

@@ -184,7 +184,8 @@ type Query {
 }
 
 type Mutation {
-  createUser(name: String!, email: String): User 
+  createUser(name: String!, email: String): User
+  updateUser(data: String!): User
 }
 
 input getPokemonBoolExp {