following python recommendation

functions have "active" docstring

src/IO.f90

@@ -10,6 +10,7 @@ module IO
 
   implicit none
   private
+
   character(len=*), parameter, public :: &
     IO_WHITESPACE = achar(44)//achar(32)//achar(9)//achar(10)//achar(13)                            !< whitespace characters
   character, parameter, public :: &
@@ -50,7 +51,7 @@ contains
 
 
 !--------------------------------------------------------------------------------------------------
-!> @brief does nothing.
+!> @brief do self test
 !--------------------------------------------------------------------------------------------------
 subroutine IO_init
 

src/rotations.f90

@@ -99,7 +99,7 @@ module rotations
 contains
 
 !--------------------------------------------------------------------------------------------------
-!> @brief doing self test
+!> @brief do self test
 !--------------------------------------------------------------------------------------------------
 subroutine rotations_init