fix(it): handle cento elision before otto/ottanta

Italian drops the trailing "o" in cento/duecento/etc. before words
starting with "o" (otto=8, ottanta=80-89). 108 is "centotto" not
"centootto", 180 is "centottanta" not "centoottanta".

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: brianfunk

languages/it.js

@@ -35,6 +35,11 @@ const tenment = (n, g) => hundment(n, g) % 100;
 const hundredIt = (n) => {
   if (n < 100 || n >= 1000) return '';
   const h = Math.floor(n / 100);
+  const remainder = n % 100;
+  // Elision: drop trailing 'o' before otto (8) and ottanta (80-89)
+  if (remainder >= 80 && remainder <= 89 || remainder === 8) {
+    return IT_HUNDREDS[h].slice(0, -1);
+  }
   return IT_HUNDREDS[h];
 };
 

test/index.test.js

@@ -1184,12 +1184,22 @@ describe('italian', () => {
     expect(italian(42)).toBe('quarantadue');
   });
 
-  it('handles elision rules', () => {
+  it('handles tens elision rules', () => {
     expect(italian(21)).toBe('ventuno');
     expect(italian(28)).toBe('ventotto');
     expect(italian(23)).toBe('ventitré');
   });
 
+  it('handles cento elision before otto/ottanta', () => {
+    expect(italian(108)).toBe('centotto');
+    expect(italian(180)).toBe('centottanta');
+    expect(italian(188)).toBe('centottantotto');
+    expect(italian(208)).toBe('duecentotto');
+    expect(italian(280)).toBe('duecentottanta');
+    expect(italian(808)).toBe('ottocentotto');
+    expect(italian(880)).toBe('ottocentottanta');
+  });
+
   it('converts thousands', () => {
     expect(italian(1000)).toBe('mille');
     expect(italian(2000)).toBe('duemila');