Update doc/specs/stdlib_math.md

Co-authored-by: Jeremie Vandenplas <jeremie.vandenplas@gmail.com>

Author: ejovo13

doc/specs/stdlib_math.md

@@ -123,7 +123,7 @@ If `n` == 1, return a rank 1 array whose only element is `end`.
 If `n` <= 0, return a rank 1 array with length 0.
 
 If `start`/`end` are `real` or `complex` types, the `result` will be of the same type and kind as `start`/`end`.
-If `start`/`end` are integer types, the `result` will default to a double precision real array.
+If `start`/`end` are `integer` types, the `result` will default to a `real(dp)` array.
 
 #### Examples