Replace ' with ’ (clientside) and only allow the latter (u+2019) to be stored

controllers/player.py

@@ -102,7 +102,7 @@ def submit():
             if "length" in input_definitions[key] and len(inputs[key]) > input_definitions[key]["length"]:
                 return(FAIL(CODE_MISSING))
 
-            inputs[key] = ''.join(c for c in inputs[key] if (c.isalnum() or c in " ,.!?-()"))
+            inputs[key] = ''.join(c for c in inputs[key] if (c.isalnum() or c in " ,.!?-()\u2019"))
 
         new_input["inputs"] = inputs
 

static/game/bootstrap/renderer.js

@@ -203,7 +203,10 @@ function submit(_button) {
     switch (element.getAttribute("type")) {
       case "text":
         inputs[element.getAttribute("name")] = element.value.replace(
-          /[^\u0020\u0021\u0028\u0029\u002C-\u002E\u003F\u00BF-\u1FFF\u2C00-\uD7FF\w]/g,
+          /[\u0027]/g,
+          "\u2019"
+        ).replace(
+          /[^\u0020\u0021\u0028\u0029\u002C-\u002E\u003F\u00BF-\u1FFF\u2C00-\uD7FF\u2019\w]/g,
           " "
         );
         break;