Use NonZeroU32 to ensure settings tabsize cannot be zero

crates/editor/src/display_map/block_map.rs

@@ -1025,7 +1025,7 @@ mod tests {
         let buffer_snapshot = buffer.read(cx).snapshot(cx);
         let subscription = buffer.update(cx, |buffer, _| buffer.subscribe());
         let (fold_map, folds_snapshot) = FoldMap::new(buffer_snapshot.clone());
-        let (tab_map, tabs_snapshot) = TabMap::new(folds_snapshot.clone(), 1);
+        let (tab_map, tabs_snapshot) = TabMap::new(folds_snapshot.clone(), 1.try_into().unwrap());
         let (wrap_map, wraps_snapshot) = WrapMap::new(tabs_snapshot, font_id, 14.0, None, cx);
         let mut block_map = BlockMap::new(wraps_snapshot.clone(), 1, 1);
 
@@ -1170,7 +1170,8 @@ mod tests {
 
         let (folds_snapshot, fold_edits) =
             fold_map.read(buffer_snapshot, subscription.consume().into_inner());
-        let (tabs_snapshot, tab_edits) = tab_map.sync(folds_snapshot, fold_edits, 4);
+        let (tabs_snapshot, tab_edits) =
+            tab_map.sync(folds_snapshot, fold_edits, 4.try_into().unwrap());
         let (wraps_snapshot, wrap_edits) = wrap_map.update(cx, |wrap_map, cx| {
             wrap_map.sync(tabs_snapshot, tab_edits, cx)
         });
@@ -1193,7 +1194,7 @@ mod tests {
         let buffer = MultiBuffer::build_simple(text, cx);
         let buffer_snapshot = buffer.read(cx).snapshot(cx);
         let (_, folds_snapshot) = FoldMap::new(buffer_snapshot.clone());
-        let (_, tabs_snapshot) = TabMap::new(folds_snapshot.clone(), 1);
+        let (_, tabs_snapshot) = TabMap::new(folds_snapshot.clone(), 1.try_into().unwrap());
         let (_, wraps_snapshot) = WrapMap::new(tabs_snapshot, font_id, 14.0, Some(60.), cx);
         let mut block_map = BlockMap::new(wraps_snapshot.clone(), 1, 1);
 
@@ -1237,7 +1238,7 @@ mod tests {
         } else {
             Some(rng.gen_range(0.0..=100.0))
         };
-        let tab_size = 1;
+        let tab_size = 1.try_into().unwrap();
         let family_id = cx.font_cache().load_family(&["Helvetica"]).unwrap();
         let font_id = cx
             .font_cache()