Cleanup: use ascii characters instead of unicode where possible

Follow own code style docs.

4 files changed, 6 insertions, 7 deletions

diff --git a/source/blender/blenkernel/intern/fcurve.c b/source/blender/blenkernel/intern/fcurve.c
index 30d5a54b479..68ed3c239ef 100644
--- a/source/blender/blenkernel/intern/fcurve.c
+++ b/source/blender/blenkernel/intern/fcurve.c
@@ -1559,8 +1559,7 @@ void BKE_fcurve_correct_bezpart(const float v1[2], float v2[2], float v3[2], con
 }
 
 /**
-   .
- * Find roots of cubic equation (c0 x³ + c1 x² + c2 x + c3)
+ * Find roots of cubic equation (c0 x^3 + c1 x^2 + c2 x + c3)
  * \return number of roots in `o`.
  *
  * \note it is up to the caller to allocate enough memory for `o`.
diff --git a/source/blender/bmesh/intern/bmesh_mesh.c b/source/blender/bmesh/intern/bmesh_mesh.c
index 5e879d41d43..69bb61a4f7d 100644
--- a/source/blender/bmesh/intern/bmesh_mesh.c
+++ b/source/blender/bmesh/intern/bmesh_mesh.c
@@ -1724,7 +1724,7 @@ static int bm_loop_normal_mark_indiv(BMesh *bm, BLI_bitmap *loops, const bool do
 
   if (use_sel_face_history) {
     /* Using face history allows to select a single loop from a single face...
-     * Note that this is On² piece of code,
+     * Note that this is O(n^2) piece of code,
      * but it is not designed to be used with huge selection sets,
      * rather with only a few items selected at most.*/
     /* Goes from last selected to the first selected element. */
diff --git a/source/blender/draw/engines/eevee/eevee_lights.c b/source/blender/draw/engines/eevee/eevee_lights.c
index cba86d058ea..e23a5a81169 100644
--- a/source/blender/draw/engines/eevee/eevee_lights.c
+++ b/source/blender/draw/engines/eevee/eevee_lights.c
@@ -96,7 +96,7 @@ static float light_shape_power_get(const Light *la, const EEVEE_Light *evli)
     }
   }
   else if (ELEM(la->type, LA_SPOT, LA_LOCAL)) {
-    power = 1.0f / (4.0f * evli->radius * evli->radius * M_PI * M_PI); /* 1/(4*r²*Pi²) */
+    power = 1.0f / (4.0f * evli->radius * evli->radius * M_PI * M_PI); /* `1/(4*(r^2)*(Pi^2))` */
 
     /* for point lights (a.k.a radius == 0.0) */
     // power = M_PI * M_PI * 0.78; /* XXX : Empirical, Fit cycles power */
@@ -106,7 +106,7 @@ static float light_shape_power_get(const Light *la, const EEVEE_Light *evli)
     /* Make illumination power closer to cycles for bigger radii. Cycles uses a cos^3 term that we
      * cannot reproduce so we account for that by scaling the light power. This function is the
      * result of a rough manual fitting. */
-    power += 1.0f / (2.0f * M_PI); /* power *= 1 + r²/2 */
+    power += 1.0f / (2.0f * M_PI); /* `power *= 1 + (r^2)/2` */
   }
   return power;
 }
@@ -257,7 +257,7 @@ void EEVEE_lights_cache_finish(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata)
     float power = max_fff(UNPACK3(evli->color)) * evli->volume;
     if (power > 0.0f && evli->light_type != LA_SUN) {
       /* The limit of the power attenuation function when the distance to the light goes to 0 is
-       * 2 / r² where r is the light radius. We need to find the right radius that emits at most
+       * `2 / r^2` where r is the light radius. We need to find the right radius that emits at most
        * the volume light upper bound. Inverting the function we get: */
       float min_radius = 1.0f / sqrtf(0.5f * upper_bound / power);
       /* Square it here to avoid a multiplication inside the shader. */
diff --git a/source/blender/makesrna/intern/rna_ui.c b/source/blender/makesrna/intern/rna_ui.c
index aefb77c4077..8f596ec6a5c 100644
--- a/source/blender/makesrna/intern/rna_ui.c
+++ b/source/blender/makesrna/intern/rna_ui.c
@@ -599,7 +599,7 @@ static void uilist_filter_items(uiList *ui_list,
         items_shown = flt_data->items_shown = shown_idx;
         flt_data->items_filter_neworder = MEM_mallocN(sizeof(int) * items_shown, __func__);
         /* And now, bring back new indices into the [0, items_shown[ range!
-         * XXX This is O(N²)... :/
+         * XXX This is O(N^2). :/
          */
         for (shown_idx = 0, prev_ni = -1; shown_idx < items_shown; shown_idx++) {
           for (i = 0, t_ni = len, t_idx = -1; i < items_shown; i++) {