Update src/sage/crypto/mq/sr.py

Co-authored-by: Martin Rubey <[email protected]>

Author: tqa236

src/sage/crypto/mq/sr.py

@@ -2289,7 +2289,7 @@ def lin_matrix(self, length=None):
         lin = matrix(self.base_ring(), length*e, length*e)
         if e == 4:
             l = [k.from_integer(x) for x in (5, 1, 12, 5)]
-            for k in range( length ):
+            for k in range(length):
                 for i in range(4):
                     for j in range(4):
                         lin[k*4+j, k*4+i] = l[(i-j) % 4] ** (2**j)