Fix issues with Claude in Assistant2 (#12619)

Release Notes:

- N/A

---------

Co-authored-by: Nathan <nathan@zed.dev>

crates/editor/src/editor.rs

@@ -554,6 +554,20 @@ pub struct GutterDimensions {
     pub git_blame_entries_width: Option<Pixels>,
 }
 
+impl GutterDimensions {
+    /// The full width of the space taken up by the gutter.
+    pub fn full_width(&self) -> Pixels {
+        self.margin + self.width
+    }
+
+    /// The width of the space reserved for the fold indicators,
+    /// use alongside 'justify_end' and `gutter_width` to
+    /// right align content with the line numbers
+    pub fn fold_area_width(&self) -> Pixels {
+        self.margin + self.right_padding
+    }
+}
+
 impl Default for GutterDimensions {
     fn default() -> Self {
         Self {

crates/editor/src/element.rs

@@ -1125,9 +1125,7 @@ impl EditorElement {
                     ix as f32 * line_height - (scroll_pixel_position.y % line_height),
                 );
                 let centering_offset = point(
-                    (gutter_dimensions.right_padding + gutter_dimensions.margin
-                        - fold_indicator_size.width)
-                        / 2.,
+                    (gutter_dimensions.fold_area_width() - fold_indicator_size.width) / 2.,
                     (line_height - fold_indicator_size.height) / 2.,
                 );
                 let origin = gutter_hitbox.origin + position + centering_offset;
@@ -4629,7 +4627,7 @@ impl Element for EditorElement {
                             &mut scroll_width,
                             &gutter_dimensions,
                             em_width,
-                            gutter_dimensions.width + gutter_dimensions.margin,
+                            gutter_dimensions.full_width(),
                             line_height,
                             &line_layouts,
                             cx,

crates/editor/src/hunk_diff.rs

@@ -320,7 +320,7 @@ impl Editor {
                     div()
                         .bg(deleted_hunk_color)
                         .size_full()
-                        .pl(gutter_dimensions.width + gutter_dimensions.margin)
+                        .pl(gutter_dimensions.full_width())
                         .child(editor_with_deleted_text.clone())
                         .into_any_element()
                 }),