Tried backpatching the cursor to avoid jumping around

kaolinite/src/document.rs

@@ -1297,17 +1297,21 @@ impl Document {
         self.file.slice(self.selection_range()).to_string()
     }
 
+    /// Commit a change to the undo management system
     pub fn commit(&mut self) {
         let s = self.take_snapshot();
+        self.undo_mgmt.backpatch_cursor(&self.cursor);
         self.undo_mgmt.commit(s);
     }
 
+    /// Completely reload the file
     pub fn reload_lines(&mut self) {
         let to = std::mem::take(&mut self.info.loaded_to);
         self.lines.clear();
         self.load_to(to);
     }
 
+    /// Delete the currently selected text
     pub fn remove_selection(&mut self) {
         self.file.remove(self.selection_range());
         self.reload_lines();

kaolinite/src/event.rs

@@ -189,4 +189,11 @@ impl UndoMgmt {
     pub fn at_file(&self) -> bool {
         self.undo.len() == self.on_disk
     }
+
+    /// Change the cursor position of the previous snapshot
+    pub fn backpatch_cursor(&mut self, cursor: &Cursor) {
+        if let Some(snapshot) = self.undo.last_mut() {
+            snapshot.cursor = *cursor;
+        }
+    }
 }