**Steps to reproduce:**
1. Create a product with a trailing space at the end of its name.
2. Create a quotation and confirm it.
3. Open the delivery through stat button.

**Observation:**
- The picking description displays the product name twice when the product name ends with trailing spaces.

**Cause:**
 The duplication occurs due to a combination of two issues:

1. **In sale_stock** 
https://github.com/odoo/odoo/blob/ac6d4f0211e7680b5f5b41537b1e2eb2c9efb239/addons/sale_stock/models/stock.py#L32
products without attributes, `_get_sale_order_line_multiline_description_variants()`  returns an `empty` string, yet the code still prepends a newline before the existing picking description. When the product name contains trailing spaces, this newline `+` trailing-space combination causes Odoo to interpret the description as multiple lines, resulting in the product name being duplicated on the picking.

2. **In web,**
the char field with `widget="text"` did not trim trailing spaces when saving the value.
This allowed product names such as `"Test  "` to be stored.

**Fix:**
- Trim the value entered in `char` fields using `widget="text"` when the field has `trim=True`, preventing trailing spaces from being saved and ensuring consistent description generation.

**opw-5351356**

Forward-Port-Of: odoo/odoo#238064