final polish after rebase

CHANGELOG.md

@@ -8,13 +8,18 @@ we hit release version 1.0.0.
 
 ## [0.14.4] - YYYY-MM-DD
 
+### Added
+- Creation of chiral GNRs (`kind=chiral` in `sisl.geom.nanoribbon`/`sisl.geom.graphene_nanoribbon` as well as `sisl.geom.cgnr`)
+- Creation of [n]-triangulenes (`sisl.geom.triangulene`)
+
+
+### Changed
+- `vacuum` is now an optional parameter for all ribbon structures
 
 
 ## [0.14.3] - 2023-11-07
 
 ### Added
-- Creation of chiral GNRs (`kind=chiral` in `sisl.geom.nanoribbon`/`sisl.geom.graphene_nanoribbon` as well as `sisl.geom.cgnr`)
-- Creation of [n]-triangulenes (`sisl.geom.triangulene`)
 - Creation of honeycomb flakes (`sisl.geom.honeycomb_flake`,
   `sisl.geom.graphene_flake`). #636
 - added `Geometry.as_supercell` to create the supercell structure,

src/sisl/geom/nanoribbon.py

@@ -423,7 +423,11 @@ def _offset_from_center(self, align, prev):
 
     def build_section(self, prev):
         new_section = nanoribbon(
-            bond=self.bond, atoms=self.atoms, width=self.W, kind=self.kind, vacuum=self.vacuum,
+            bond=self.bond,
+            atoms=self.atoms,
+            width=self.W,
+            kind=self.kind,
+            vacuum=self.vacuum,
         )
 
         align, offset = self._align_offset(prev, new_section)
@@ -520,7 +524,8 @@ def add_section(self, geom, new_section):
             new_section = new_section.move(move)
         if new_max > geom.cell[1, 1]:
             geom = geom.add_vacuum(
-                new_max - geom.cell[self.trans_ax, self.trans_ax] + self.vacuum, self.trans_ax
+                new_max - geom.cell[self.trans_ax, self.trans_ax] + self.vacuum,
+                self.trans_ax,
             )
 
         self.xyz = new_section.xyz