fix format

doc/collections_as_container.md

@@ -93,8 +93,8 @@ In the following tables a convention from `Collection` is used: `iterator` stand
 | `std::random_access_iterator` | ✔️ yes | ✔️ yes |
 | `std::contiguous_iterator` | ❌ no | ❌ no |
 
-> [!NOTE]  
->The collections' iterators fulfil the `std::forward_iterator` except that the pointers obtained with `->` remain valid only as long as the iterator is valid instead of as long as the range remain valid. In practice this means a `ptr` obtained with `auto* ptr = it.operator->();` is valid only as long as `it` is valid. 
+> [!NOTE]
+>The collections' iterators fulfil the `std::forward_iterator` except that the pointers obtained with `->` remain valid only as long as the iterator is valid instead of as long as the range remain valid. In practice this means a `ptr` obtained with `auto* ptr = it.operator->();` is valid only as long as `it` is valid.
 >The values obtained immediately through `->` (for instance `auto& e = it->energy();`) behaves as expected for `std::forward_iterator` as their validity is tied to the validity of a collection.
 
 ### LegacyIterator

python/templates/Collection.h.jinja2

@@ -187,7 +187,7 @@ public:
   }
   const_reverse_iterator crend() const {
     return rend();
-  } 
+  }
 
 
 {% for member in Members %}

tests/unittests/std_interoperability.cpp

@@ -743,10 +743,10 @@ TEST_CASE("Collection and unsupported iterator concepts", "[collection][containe
   DOCUMENTED_STATIC_FAILURE(std::output_iterator<const_iterator, CollectionType::mutable_type>);
   // std::contiguous_iterator
   DOCUMENTED_STATIC_FAILURE(std::is_lvalue_reference_v<iterator::reference>);
-  DOCUMENTED_STATIC_FAILURE(std::same_as<iterator::value_type, std::remove_cvref_t<iterator::reference>>); 
+  DOCUMENTED_STATIC_FAILURE(std::same_as<iterator::value_type, std::remove_cvref_t<iterator::reference>>);
   DOCUMENTED_STATIC_FAILURE(std::contiguous_iterator<iterator>);
   DOCUMENTED_STATIC_FAILURE(std::is_lvalue_reference_v<const_iterator::reference>);
-  STATIC_REQUIRE(std::same_as<const_iterator::value_type, std::remove_cvref_t<const_iterator::reference>>); 
+  STATIC_REQUIRE(std::same_as<const_iterator::value_type, std::remove_cvref_t<const_iterator::reference>>);
   DOCUMENTED_STATIC_FAILURE(std::contiguous_iterator<const_iterator>);
 }
 #endif // __cplusplus >= 202002L

tests/unittests/unittest.cpp

@@ -220,7 +220,6 @@ TEST_CASE("Reverse iterators", "[basics]") {
   REQUIRE((*++it).energy() == 42);
 }
 
-
 TEST_CASE("Notebook", "[basics]") {
   auto hits = ExampleHitCollection();
   for (unsigned i = 0; i < 12; ++i) {