fix Int::is_prime

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/lib/core/math.nit b/lib/core/math.nit
index 36cf3fe..0f8325f 100644 (file)
--- a/lib/core/math.nit
+++ b/lib/core/math.nit
@@ -128,7 +128,7 @@ redef class Int
        #
        # assert 3.is_prime
        # assert not 1.is_prime
-       # assert not 12.is_prime
+       # assert not 15.is_prime
        fun is_prime: Bool
        do
                if self == 2 then
@@ -136,7 +136,7 @@ redef class Int
                else if self <= 1 or self.is_even then
                        return false
                end
-               for i in [3..self.sqrt[ do
+               for i in [3..self.sqrt] do
                        if self % i == 0 then return false
                end
                return true