minor cleanup; create list instead of appending repeatedly

tfpf · tfpf · commit 911cb373793b · 2021-07-25T01:44:35.000+05:30
diff --git a/lib/matplotlib/_mathtext.py b/lib/matplotlib/_mathtext.py
@@ -2771,19 +2771,18 @@ def _genfrac(self, ldelim, rdelim, rule, style, num, den):
         cnum.hpack(width, 'exactly')
         cden.hpack(width, 'exactly')
 
-        vlist_builder = []
         if cnum.height < cap_height:
             cnum.height = cap_height
-        vlist_builder.append(cnum)
         numerator_padding = max(
-            cap_height * 3/5 - cnum.depth, min_clearance) - thickness
-        vlist_builder.append(Vbox(0, numerator_padding))
-        vlist_builder.append(Hrule(state, rule))
+            3/5 * cap_height - cnum.depth, min_clearance) - thickness
         denominator_padding = max(
             4/3 * cap_height - cden.height, min_clearance) + thickness
-        vlist_builder.append(Vbox(0, denominator_padding))
-        vlist_builder.append(cden)
-        vlist = Vlist(vlist_builder)
+        vlist = Vlist([cnum,                         # numerator
+                       Vbox(0, numerator_padding),   # space
+                       Hrule(state, rule),           # rule
+                       Vbox(0, denominator_padding), # space
+                       cden                          # denominator
+                       ])
 
         # Shift so the fraction line sits in the middle of the
         # minus sign
