moved position of closing parenthesis

Author: makeajourney

pandas/io/parsers.py

@@ -3530,7 +3530,7 @@ def get_rows(self, infer_nrows, skiprows=None):
 
     def detect_colspecs(self, infer_nrows=100, skiprows=None):
         # Regex escape the delimiters
-        delimiters = ''.join(r'\{}'.format(x for x in self.delimiter))
+        delimiters = ''.join(r'\{}'.format(x) for x in self.delimiter)
         pattern = re.compile('([^{}]+)'.format(delimiters))
         rows = self.get_rows(infer_nrows, skiprows)
         if not rows: