Implement unit property for flags

admin/sync/exercice_defines.go

@@ -46,6 +46,7 @@ type ExerciceFlag struct {
 	LockedFile    []ExerciceUnlockFile `toml:"unlock_file,omitempty"`
 	NeedFlag      []ExerciceDependency `toml:"need_flag,omitempty"`
 	NoShuffle     bool
+	Unit          string      `toml:"unit,omitempty"`
 	NumberMin     interface{} `toml:"min,omitempty"`
 	NumberMax     interface{} `toml:"max,omitempty"`
 	NumberStep    interface{} `toml:"step,omitempty"`

admin/sync/exercice_keys.go

@@ -136,6 +136,7 @@ func buildKeyFlag(exercice fic.Exercice, flag ExerciceFlag, flagline int, defaul
 		Label:           flag.Label,
 		Placeholder:     flag.Placeholder,
 		Help:            flag.Help,
+		Unit:            flag.Unit,
 		IgnoreCase:      !flag.CaseSensitive,
 		Multiline:       flag.Type == "text",
 		ValidatorRegexp: validatorRegexp(flag.ValidatorRe),