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index 5cf2e5a..2b87f2a 100644
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index 301dbc8..3acf7a0 100644
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+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>The correct answer is 4: while <code>1</code> is an integer,
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index 59792a4..55e68fe 100644
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diff --git a/09_Creating_Packages.html b/09_Creating_Packages.html
index 887347d..ef39f2d 100644
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index b5f5518..069dbfb 100644
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diff --git a/404.html b/404.html
index e129e7a..f1a4116 100644
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diff --git a/CODE_OF_CONDUCT.html b/CODE_OF_CONDUCT.html
index b418124..53aa167 100644
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diff --git a/LICENSE.html b/LICENSE.html
index 7928213..5e0e7ae 100644
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diff --git a/aio.html b/aio.html
index 7a0e563..b2a0f8a 100644
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 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
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 <div class="accordion-body">
 <p>The correct answer is 4: while <code>1</code> is an integer,
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@@ -3661,8 +3661,8 @@ <h3 class="card-title">Objectives</h3>
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diff --git a/discuss.html b/discuss.html
index 14f833d..b37ae7b 100644
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diff --git a/images.html b/images.html
index 4a2b270..6f006ca 100644
--- a/images.html
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index 47b0eed..2a231b5 100644
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index 6f560c0..5874a87 100644
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index c784bec..35c637c 100644
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index 59eaac4..795bfd3 100644
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diff --git a/instructor/03_Julia_type_system.html b/instructor/03_Julia_type_system.html
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 <div class="accordion-body">
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