 # Raises an error if one of the arguments is not an integer.
 # Can be used in guard tests.
 #
-# == Examples
+# ## Examples
 #
 #     5 rem 2 #=> 1
 #

# Raises an error if one of the arguments is not an integer.
# Can be used in guard tests.
#
# == Examples
#
#     5 div 2 #=> 2
#

# argument and returns true if it is false or nil. Returns false
# otherwise.
#
# ## Examples
#
#   !1        #=> false
#   ![1,2,3]  #=> false
