docs: remove extra commas to fix #1801 (#2067)

Author: Kaiwei Yang

docs/advanced-customization/custom-templates.md

@@ -34,7 +34,7 @@ function ArrayFieldTemplate(props) {
 
 render((
   <Form schema={schema}
-        ArrayFieldTemplate={ArrayFieldTemplate} />,
+        ArrayFieldTemplate={ArrayFieldTemplate} />
 ), document.getElementById("app"));
 ```
 
@@ -111,7 +111,7 @@ function CustomFieldTemplate(props) {
 
 render((
   <Form schema={schema}
-        FieldTemplate={CustomFieldTemplate} />,
+        FieldTemplate={CustomFieldTemplate} />
 ), document.getElementById("app"));
 ```
 
@@ -179,7 +179,7 @@ function ObjectFieldTemplate(props) {
 
 render((
   <Form schema={schema}
-        ObjectFieldTemplate={ObjectFieldTemplate} />,
+        ObjectFieldTemplate={ObjectFieldTemplate} />
 ), document.getElementById("app"));
 ```
 

docs/advanced-customization/custom-widgets-fields.md

@@ -113,7 +113,7 @@ const uiSchema = {
 
 render((
   <Form schema={schema}
-        uiSchema={uiSchema} />,
+        uiSchema={uiSchema} />
 ), document.getElementById("app"));
 ```
 

docs/api-reference/form-props.md

@@ -115,7 +115,7 @@ const schema = {
 
 render((
   <Form schema={schema}
-        idPrefix={"rjsf_prefix"}/>,
+        idPrefix={"rjsf_prefix"}/>
 ), document.getElementById("app"));
 ```
 

docs/usage/validation.md

@@ -263,7 +263,7 @@ const extraErrors = {
 
 render((
   <Form schema={schema}
-        extraErrors={extraErrors} />,
+        extraErrors={extraErrors} />
 ), document.getElementById("app"));
 ```