fix(updatecell.js): 修复双击和Enter键激活单元格，输入中文时的首字母变成拼音的bug

修复双击和Enter键激活单元格，输入中文时的首字母变成拼音的bug

fix #726

src/controllers/updateCell.js

@@ -214,9 +214,9 @@ export function luckysheetupdateCell(row_index1, col_index1, d, cover, isnotfocu
         input_postition["min-width"] = input_postition["max-width"];
     }
    
-    if((value == null || value.toString() == "") && !cover){
+    // if((value == null || value.toString() == "") && !cover){
-        value = "<br/>";
+    //     value = "<br/>";
-    }
+    // }
     value = formula.xssDeal(value);
     if(!checkProtectionCellHidden(row_index, col_index, Store.currentSheetIndex) && value.length>0 && value.substr(0, 63)=='<span dir="auto" class="luckysheet-formula-text-color">=</span>'){
         $("#luckysheet-rich-text-editor").html("");