edit x.c
type:
"
wait
<space>

following config makes it break to:
"wait""
but it should be:
"wait "

i  wait        * wait<C-O>:echoh HintHL|echo "pid_t wait(int * status)"|echoh None<CR>
        Last set from ~/bash.xp/vim.xp/plg-git/Hints-for-C-Library-Functions/ftplugin/c/hints_man2.vim
i  waitpid     * waitpid<C-O>:echoh HintHL|echo "pid_t waitpid(pid_t pid, int * status, int options)"|echoh None<CR>
        Last set from ~/bash.xp/vim.xp/plg-git/Hints-for-C-Library-Functions/ftplugin/c/hints_man2.vim
i  wait4       * wait4<C-O>:echoh HintHL|echo "pid_t wait4(pid_t pid, int * status, int options, struct rusage * rusage)"|echoh None<CR>
        Last set from ~/bash.xp/vim.xp/plg-git/Hints-for-C-Library-Functions/ftplugin/c/hints_man2.vim
i  wait3       * wait3<C-O>:echoh HintHL|echo "pid_t wait3(int * status, int options, struct rusage * rusage)"|echoh None<CR>
        Last set from ~/bash.xp/vim.xp/plg-git/Hints-for-C-Library-Functions/ftplugin/c/hints_man2.vim