fix docstring whitespaces

Author: Ivo-Maffei

src/sage/coding/kasami_codes.pyx

@@ -9,23 +9,24 @@ The extended Kasami code with parameters `(s,t)` is defined as
 
 .. MATH::
 
-    \{ v \in GF(2)^s \mid
-    \sum_{a \in GF(s)} v_a =
-    \sum_{a \in GF(s)} a v_a =
-    \sum_{a \in GF(s)} a^{t+1} v_a = 0 \}
+  \{ v \in GF(2)^s \mid
+  \sum_{a \in GF(s)} v_a =
+  \sum_{a \in GF(s)} a v_a =
+  \sum_{a \in GF(s)} a^{t+1} v_a = 0 \}
+
 
 It follows that these are subfield subcodes of
 the code having those three equations as parity checks.
 
 The only valid parameters `s,t` are given by the below,
-where `q` is a power of 2:
+  where `q` is a power of 2:
     * `s = q^{2j+1}`, `t = q^m` with `m \leq j` and `\gcd(m,2j+1) = 1`
     * `s = q^2`, `t=q`
 
 The coset graphs of the Kasami codes are distance-regular.
 
 In particular, the extended Kasami codes result in
-distance-regular graphs with intersection arrays:
+  distance-regular graphs with intersection arrays:
     * `[q^{2j+1}, q^{2j+1} - 1, q^{2j+1} - q, q^{2j+1} - q^{2j} + 1;`
       `1, q, q^{2j} -1, q^{2j+1}]`
     * `[q^2, q^2 - 1, q^2 - q, 1; 1, q, q^2 - 1, q^2]`