remove :{} and leading/trailing whitespace from field names on save

rslib/src/notetype/fields.rs

@@ -34,4 +34,17 @@ impl NoteField {
             },
         }
     }
+
+    pub(crate) fn fix_name(&mut self) {
+        // remove special characters
+        let bad_chars = |c| c == ':' || c == '{' || c == '}';
+        if self.name.contains(bad_chars) {
+            self.name = self.name.replace(bad_chars, "");
+        }
+        // and leading/trailing whitespace
+        let trimmed = self.name.trim();
+        if trimmed.len() != self.name.len() {
+            self.name = trimmed.into();
+        }
+    }
 }

rslib/src/notetype/mod.rs

@@ -194,6 +194,7 @@ impl NoteType {
             return Err(AnkiError::invalid_input("1 template required"));
         }
         self.normalize_names();
+        self.fix_field_names();
         self.ensure_names_unique();
         self.reposition_sort_idx();
 
@@ -289,6 +290,10 @@ impl NoteType {
     pub fn target_deck_id(&self) -> DeckID {
         DeckID(self.config.target_deck_id)
     }
+
+    fn fix_field_names(&mut self) {
+        self.fields.iter_mut().for_each(NoteField::fix_name);
+    }
 }
 
 impl From<NoteType> for NoteTypeProto {