Update doc/specs/stdlib_math.md

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

Author: aman-godara

doc/specs/stdlib_math.md

@@ -48,7 +48,7 @@ Note: All arguments must have same `type` and same `kind`.
 
 Output is a scalar of either `integer` or `real` depending on the arguments. The output value will have `type` and `kind` same as to that of the arguments.
 
-#### Example(s) of usage
+#### Examples
 
 ##### Example 1: