When duplicating a test case, also duplicate inputInstantsByVariableNameArray. Fix #78.

src/lib/components/test_cases/TestCaseCompareModal.svelte

@@ -22,6 +22,13 @@
   const evaluationByNameArray = getContext("evaluationByNameArray") as Writable<
     EvaluationByName[]
   >
+  const inputInstantsByVariableNameArray = getContext(
+    "inputInstantsByVariableNameArray",
+  ) as Writable<
+    Array<{
+      [name: string]: Set<string>
+    }>
+  >
   const testCases = getContext("testCases") as Writable<Situation[]>
   const testCasesIndex = getContext("testCasesIndex") as Writable<number[]>
   let selectedTestCaseIndex = $testCasesIndex[1]
@@ -48,6 +55,14 @@
       duplicatedEvaluationByName,
     ]
 
+    const duplicatedInputInstantsByVariableName = deepCopy(
+      $inputInstantsByVariableNameArray[$testCasesIndex[0]],
+    )
+    $inputInstantsByVariableNameArray = [
+      ...$inputInstantsByVariableNameArray,
+      duplicatedInputInstantsByVariableName,
+    ]
+
     const duplicatedValuesByCalculationNameByVariableName = deepCopy(
       $valuesByCalculationNameByVariableNameArray[$testCasesIndex[0]],
     )