Fix typo

Author: mhucka

src/openfermion/contrib/representability/_multitensor.py

@@ -95,7 +95,7 @@ def synthesize_dual_basis(self):
 
         :returns: sparse matrix
         """
-        # go throught the dual basis list and synthesize each element
+        # go through the dual basis list and synthesize each element
         dual_row_indices = []
         dual_col_indices = []
         dual_data_values = []