fix(examples): unset `fooModeExit` before first run

examples/lua/prompt-callback.lua

@@ -17,4 +17,5 @@ function FooMode()
 end
 
 -- enter the prompt
+vim.g.fooModeExit = false
 libmodal.prompt.enter('FOO', FooMode, commandList)

examples/lua/prompt-commands.lua

@@ -10,4 +10,5 @@ local commands =
 }
 
 -- begin the prompt
+vim.g.fooModeExit = false
 libmodal.prompt.enter('FOO', commands)

examples/prompt-callback.vim

@@ -14,5 +14,6 @@ function! s:fooMode() abort
 	endif
 endfunction
 
+let g:fooModeExit = v:false
 " You have to convert s:commandList from a Vimscript list to a lua table using luaeval().
 call luaeval("require('libmodal').prompt.enter('FOO', 's:fooMode', _A)", s:commandList)