Remove useless if branch in sign map creation

Author: JordiManyer

NEWS.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Fixed `is_slave == false` (comparison instead of assignment) in `DivConformingFESpaces`, and simplified the boundary-facet branch by removing the now-redundant `if/else`.
+
 ## [0.4.11] - 2026-02-20
 
 ### Added

src/DivConformingFESpaces.jl

@@ -126,9 +126,7 @@ function _generate_sign_flips(model,cell_reffes)
                 cells_around_facets,
                 facet_gid)
           is_slave=false
-          if (length(facet_cells_around)==1)
-            is_slave == false
-          else
+          if length(facet_cells_around) > 1
             mx=maximum(loc_to_glo[facet_cells_around])
             is_slave = (loc_to_glo[cell] == mx)
           end