Meta: Enforce newlines around namespaces

This has come up several times during code review, so let's just enforce
it using a new clang-format 20 option.

Libraries/LibWeb/CSS/CascadedProperties.cpp

@@ -10,6 +10,7 @@
 #include <LibWeb/DOM/Element.h>
 
 namespace Web::CSS {
+
 GC_DEFINE_ALLOCATOR(CascadedProperties);
 
 CascadedProperties::CascadedProperties() = default;

Libraries/LibWeb/CSS/CharacterTypes.h

@@ -70,4 +70,5 @@ constexpr bool is_greater_than_maximum_allowed_code_point(u32 code_point)
     // The greatest code point defined by Unicode: U+10FFFF.
     return code_point > 0x10FFFF;
 }
+
 }

Libraries/LibWeb/CSS/Frequency.h

@@ -10,6 +10,7 @@
 #include <LibWeb/Forward.h>
 
 namespace Web::CSS {
+
 class Frequency {
 public:
     enum class Type {

Libraries/LibWeb/CSS/MediaQueryListEvent.h

@@ -37,4 +37,5 @@ private:
     String m_media;
     bool m_matches;
 };
+
 }

Libraries/LibWeb/CSS/Number.h

@@ -90,6 +90,7 @@ private:
     double m_value { 0 };
     Type m_type;
 };
+
 }
 
 template<>

Libraries/LibWeb/CSS/Parser/ComponentValue.h

@@ -47,6 +47,7 @@ public:
 private:
     Variant<Token, Function, SimpleBlock> m_value;
 };
+
 }
 
 template<>

Libraries/LibWeb/CSS/Parser/Parser.h

@@ -41,6 +41,7 @@ namespace Web::CSS::Parser {
 class PropertyDependencyNode;
 
 namespace CalcParsing {
+
 struct Operator {
     char delim;
 };
@@ -61,6 +62,7 @@ struct InvertNode {
 struct NegateNode {
     Node child;
 };
+
 }
 
 enum class ParsingMode {

Libraries/LibWeb/CSS/Parser/Tokenizer.h

@@ -106,4 +106,5 @@ private:
     Token::Position m_position;
     Token::Position m_prev_position;
 };
+
 }

Libraries/LibWeb/CSS/Resolution.h

@@ -52,4 +52,5 @@ private:
     Type m_type;
     double m_value { 0 };
 };
+
 }

Libraries/LibWeb/CSS/StyleComputer.cpp

@@ -105,10 +105,12 @@ struct FontFaceKey {
 namespace AK {
 
 namespace Detail {
+
 template<>
 inline constexpr bool IsHashCompatible<Web::CSS::FontFaceKey, Web::CSS::OwnFontFaceKey> = true;
 template<>
 inline constexpr bool IsHashCompatible<Web::CSS::OwnFontFaceKey, Web::CSS::FontFaceKey> = true;
+
 }
 
 template<>

Libraries/LibWeb/CSS/StyleSheetIdentifier.h

@@ -29,6 +29,7 @@ struct StyleSheetIdentifier {
 
 StringView style_sheet_identifier_type_to_string(StyleSheetIdentifier::Type);
 Optional<StyleSheetIdentifier::Type> style_sheet_identifier_type_from_string(StringView);
+
 }
 
 namespace IPC {

Libraries/LibWeb/CSS/StyleValues/BackgroundSizeStyleValue.cpp

@@ -10,6 +10,7 @@
 #include "BackgroundSizeStyleValue.h"
 
 namespace Web::CSS {
+
 BackgroundSizeStyleValue::BackgroundSizeStyleValue(LengthPercentage size_x, LengthPercentage size_y)
     : StyleValueWithDefaultOperators(Type::BackgroundSize)
     , m_properties { .size_x = size_x, .size_y = size_y }

Libraries/LibWeb/CSS/StyleValues/ColorSchemeStyleValue.h

@@ -41,4 +41,5 @@ private:
         bool operator==(Properties const&) const = default;
     } m_properties;
 };
+
 }

Libraries/LibWeb/CSS/SystemColor.h

@@ -31,4 +31,5 @@ Color mark_text(PreferredColorScheme);
 Color selected_item(PreferredColorScheme);
 Color selected_item_text(PreferredColorScheme);
 Color visited_text(PreferredColorScheme);
+
 }

Libraries/LibWeb/CSS/TransitionEvent.h

@@ -39,4 +39,5 @@ private:
     double m_elapsed_time {};
     String m_pseudo_element {};
 };
+
 }

Libraries/LibWeb/CSS/URL.h

@@ -12,6 +12,7 @@
 #include <LibWeb/CSS/Enums.h>
 
 namespace Web::CSS {
+
 // https://drafts.csswg.org/css-values-5/#request-url-modifiers
 class RequestURLModifier {
 public: