[ODOO] Upstream Changes of Odoo to Flectra till commit ref. https://github.com/odoo/odoo/commit/d636c6c95cb6af5fead1509ce9723e23d5f5f762

addons/base_import/models/base_import.py

@@ -302,7 +302,8 @@ class Import(models.TransientModel):
         try:
             thousand_separator = decimal_separator = False
             for val in preview_values:
-                if val == '':
+                val = val.strip()
+                if not val:
                     continue
                 # value might have the currency symbol left or right from the value
                 val = self._remove_currency_symbol(val)
@@ -587,6 +588,7 @@ class Import(models.TransientModel):
         thousand_separator = options.get('float_thousand_separator', ' ')
         decimal_separator = options.get('float_decimal_separator', '.')
         for line in data:
+            line[index] = line[index].strip()
             if not line[index]:
                 continue
             line[index] = line[index].replace(thousand_separator, '').replace(decimal_separator, '.')
@@ -620,9 +622,11 @@ class Import(models.TransientModel):
                     # versions, for both data and pattern
                     user_format = pycompat.to_native(options.get('%s_format' % field['type']))
                     for num, line in enumerate(data):
+                        if line[index]:
+                            line[index] = line[index].strip()
                         if line[index]:
                             try:
-                                line[index] = dt.strftime(dt.strptime(pycompat.to_native(line[index].strip()), user_format), server_format)
+                                line[index] = dt.strftime(dt.strptime(pycompat.to_native(line[index]), user_format), server_format)
                             except ValueError as e:
                                 raise ValueError(_("Column %s contains incorrect values. Error in line %d: %s") % (name, num + 1, e))
                             except Exception as e: