Update clang format

.clang-format

@@ -1,5 +1,5 @@
 #
-# The clang-format (Clang 6) style file used by deal.II.
+# The clang-format (Clang 16) style file used by deal.II.
 #
 
 AccessModifierOffset: -2
@@ -26,8 +26,9 @@ BinPackArguments: false
 BinPackParameters: false
 
 BraceWrapping:
+  AfterCaseLabel: true
   AfterClass: true
-  AfterControlStatement: true
+  AfterControlStatement: Always
   AfterEnum: true
   AfterExternBlock: true
   AfterFunction: true
@@ -36,6 +37,8 @@ BraceWrapping:
   AfterUnion: true
   BeforeCatch: true
   BeforeElse: true
+  BeforeLambdaBody: false
+  BeforeWhile: true
   IndentBraces: true
   SplitEmptyFunction: false
   SplitEmptyRecord: false
@@ -69,6 +72,8 @@ IncludeCategories:
     Priority: -1
 # deal.II folders in sorted order:
   - Regex:    "deal.II/algorithms/.*\\.h"
+    Priority: 100
+  - Regex:    "deal.II/arborx/.*\\.h"
     Priority: 110
   - Regex:    "deal.II/base/.*\\.h"
     Priority: 120
@@ -112,6 +117,8 @@ IncludeCategories:
     Priority: 300
   - Regex:    "deal.II/sundials/.*\\.h"
     Priority: 310
+  - Regex:    "deal.II/trilinos/.*\\.h"
+    Priority: 320
 # put boost right after deal:
   - Regex: "<boost.*>"
     Priority: 500
@@ -153,6 +160,8 @@ PointerAlignment: Right
 ReflowComments: true
 CommentPragmas: '( \| |\*--|<li>|@ref | @p |@param |@name |@returns |@warning |@ingroup |@author |@date |@related |@relates |@relatesalso |@deprecated |@image |@return |@brief |@attention |@copydoc |@addtogroup |@todo |@tparam |@see |@note |@skip |@skipline |@until |@line |@dontinclude |@include)'
 
+QualifierAlignment: Left
+
 SortIncludes: true
 SortUsingDeclarations: true
 
@@ -168,7 +177,7 @@ SpacesInContainerLiterals: false
 SpacesInParentheses: false
 SpacesInSquareBrackets: false
 
-Standard: Cpp11
+Standard: c++20
 
 TabWidth: 2