sync: Allow Markdown in flag help

admin/static/js/common.js

@@ -211,7 +211,7 @@ angular.module("FICApp")
               </button>
             </div>
           </div>
-          <small class="form-text text-muted" ng-if="!$ctrl.key.found && $ctrl.key.help.length > 0" ng-bind="$ctrl.key.help"></small>
+          <small class="form-text text-muted" ng-if="!$ctrl.key.found && $ctrl.key.help.length > 0" ng-bind-html="$ctrl.key.help"></small>
           <span class="glyphicon glyphicon-ok form-control-feedback text-success" aria-hidden="true" ng-if="$ctrl.key.found" title="Flag trouvé à {{ $ctrl.key.found | date:'mediumTime'}}"></span>
         </div>
         `

admin/sync/exercice_keys.go

@@ -265,6 +265,14 @@ func buildExerciceFlag(i Importer, exercice *fic.Exercice, flag ExerciceFlag, nl
 		}
 	}
 
+	if len(flag.Help) > 0 {
+		if mdhelp, err := ProcessMarkdown(i, flag.Help, exercice.Path); err != nil {
+			errs = append(errs, fmt.Sprintf("%q: flag #%d: unable to parse property help as Markdown: %s", path.Base(exercice.Path), nline+1), err.Error())
+		} else {
+			flag.Help = mdhelp[3 : len(mdhelp)-4]
+		}
+	}
+
 	if flag.Type == "key" || strings.HasPrefix(flag.Type, "number") || flag.Type == "text" || flag.Type == "ucq" || flag.Type == "radio" || flag.Type == "vector" {
 		addedFlag, choices, berrs := buildKeyFlag(exercice, flag, nline+1, "Flag")
 		if len(berrs) > 0 {

frontend/ui/src/components/FlagKey.svelte

@@ -195,7 +195,7 @@
             {/if}
         {/each}
         {#if flag.help}
-            <small class="form-text text-muted">{flag.help}</small>
+            <small class="form-text text-muted">{@html flag.help}</small>
         {/if}
     {:else}
         <Icon