CI: adjust clang-formatting

- duplicate the file to .base
- drop 10-and-later setting that was commented out
- specific setting for lambda-formatting (this seems to be the default)

.clang-format

@@ -8,6 +8,7 @@ AlignEscapedNewlines: DontAlign
 AllowAllParametersOfDeclarationOnNextLine: "false"
 AllowShortFunctionsOnASingleLine: Inline
 AllowShortIfStatementsOnASingleLine: "false"
+AllowShortLambdasOnASingleLine: All
 AllowShortLoopsOnASingleLine: "false"
 AlwaysBreakAfterReturnType: TopLevelDefinitions
 AlwaysBreakTemplateDeclarations: Yes
@@ -28,7 +29,6 @@ ReflowComments: "false"
 SortIncludes: "true"
 SpaceAfterCStyleCast: "false"
 SpacesBeforeTrailingComments: "2"
-# SpaceInEmptyBlock: "true"
 SpacesInAngles: "true"
 SpacesInParentheses: "true"
 SpacesInSquareBrackets: "true"

.clang-format.base

@@ -0,0 +1,35 @@
+#   SPDX-FileCopyrightText: no
+#   SPDX-License-Identifier: CC0-1.0
+---
+BasedOnStyle: WebKit
+
+AlignAfterOpenBracket: Align
+AlignEscapedNewlines: DontAlign
+AllowAllParametersOfDeclarationOnNextLine: "false"
+AllowShortFunctionsOnASingleLine: Inline
+AllowShortIfStatementsOnASingleLine: "false"
+AllowShortLambdasOnASingleLine: All
+AllowShortLoopsOnASingleLine: "false"
+AlwaysBreakAfterReturnType: TopLevelDefinitions
+AlwaysBreakTemplateDeclarations: Yes
+BinPackArguments: "false"
+BinPackParameters: "false"
+BreakBeforeBraces: Allman
+BreakBeforeTernaryOperators: "true"
+BreakConstructorInitializers: BeforeComma
+ColumnLimit: 120
+Cpp11BracedListStyle: "false"
+FixNamespaceComments: "true"
+IncludeBlocks: Preserve
+IndentWidth: "4"
+MaxEmptyLinesToKeep: "2"
+NamespaceIndentation: None
+PointerAlignment: Left
+ReflowComments: "false"
+SortIncludes: "true"
+SpaceAfterCStyleCast: "false"
+SpacesBeforeTrailingComments: "2"
+SpacesInAngles: "true"
+SpacesInParentheses: "true"
+SpacesInSquareBrackets: "true"
+Standard: Cpp11