Updating PHPCS ruleset to match a better style guideline (blank lines for opening/closing braces)

phpcs.xml

@@ -16,13 +16,25 @@
         <exclude name="PSR2.Classes.ClassDeclaration.OpenBraceNewLine"/>
         <exclude name="PSR12.Classes.OpeningBraceSpace.Found"/>
         <exclude name="Squiz.Functions.MultiLineFunctionDeclaration.BraceOnNewLine"/>
-        <exclude name="Generic.Files.LineLength"/>
+        <exclude name="Squiz.Functions.MultiLineFunctionDeclaration.BraceOnSameLine"/>
     </rule>
 
     <!-- Require opening braces to be on the same line (1TBS / K&R style) -->
     <rule ref="Generic.Classes.OpeningBraceSameLine"/>
     <rule ref="Generic.Functions.OpeningFunctionBraceKernighanRitchie"/>
 
+    <!-- Enforce exactly 1 blank line before/after a class closing/opening brace -->
+    <rule ref="Squiz.WhiteSpace.ClassOpeningSpacing">
+        <properties>
+            <property name="spacing" value="1"/>
+        </properties>
+    </rule>
+    <rule ref="Squiz.WhiteSpace.ClassClosingSpacing">
+        <properties>
+            <property name="spacing" value="1"/>
+        </properties>
+    </rule>
+
     <!-- Enforce 2-space indentation instead of 4 -->
     <rule ref="Generic.WhiteSpace.ScopeIndent">
         <properties>