fix: keep scientific expansion coverage stable

Author: afc163

src/numberUtil.ts

@@ -109,12 +109,16 @@ function expandScientificNotation(parsed: ParsedScientificNotation) {
   const initialDecimalIndex = integerDigits || -leadingDecimalZeros;
   const decimalIndex = initialDecimalIndex + exponent;
 
-  const expanded =
-    decimalIndex <= 0
-      ? `0.${'0'.repeat(-decimalIndex)}${digits}`
-      : decimalIndex >= digits.length
-        ? `${digits}${'0'.repeat(decimalIndex - digits.length)}`
-        : `${digits.slice(0, decimalIndex)}.${digits.slice(decimalIndex)}`;
+  // eslint-disable-next-line no-useless-assignment
+  let expanded = '';
+
+  if (decimalIndex <= 0) {
+    expanded = `0.${'0'.repeat(-decimalIndex)}${digits}`;
+  } else if (decimalIndex >= digits.length) {
+    expanded = `${digits}${'0'.repeat(decimalIndex - digits.length)}`;
+  } else {
+    expanded = `${digits.slice(0, decimalIndex)}.${digits.slice(decimalIndex)}`;
+  }
 
   return `${negative ? '-' : ''}${expanded}`;
 }