fix(space): 修复t-space存在冗余空格的问题

修复了在t-space嵌套使用时，如果内层的t-space用v-if判断，条件为false，仍然会生成t-space-item元素，导致样式不正确的问题。

closed #4649

src/space/space.tsx

@@ -57,16 +57,26 @@ export default defineComponent({
     function renderChildren() {
       const children = getChildSlots();
       const separatorContent = renderTNodeJSX('separator');
-      return children.map((child, index) => {
-        // filter last child
-        const showSeparator = index + 1 !== children.length && separatorContent;
-        return (
-          <Fragment>
-            <div class={`${COMPONENT_NAME.value}-item`}>{child}</div>
-            {showSeparator && <div class={`${COMPONENT_NAME.value}-item-separator`}>{separatorContent}</div>}
-          </Fragment>
-        );
-      });
+      return (
+        children
+          // filter symbol type
+          .filter((item) => {
+            if (typeof item.type === 'symbol' && typeof item.children === 'string') {
+              return false;
+            }
+            return item.type !== Comment;
+          })
+          .map((child, index) => {
+            // filter last child
+            const showSeparator = index + 1 !== children.length && separatorContent;
+            return (
+              <Fragment>
+                <div class={`${COMPONENT_NAME.value}-item`}>{child}</div>
+                {showSeparator && <div class={`${COMPONENT_NAME.value}-item-separator`}>{separatorContent}</div>}
+              </Fragment>
+            );
+          })
+      );
     }
 
     return () => {