HubLot/vim-gromacs — pull request #20 by jbarnoud (2012-12-11 16:08:58+00:00)
Title: Add number of atoms fix for gro files 

To fix the number of atoms run the "Unatoms" command.
To do the fix automatically at saving time add to your .vimrc:

autocmd BufWritePre *.gro call Update_number_of_atoms()