Tweak clang-format configuration.

2019-09-18  Martin Liska  <mliska@suse.cz>

	* clang-format: Tweak configuration based on new
	options offered.

From-SVN: r275875

contrib/ChangeLog

+2019-09-18  Martin Liska  <mliska@suse.cz>
+
+	* clang-format: Tweak configuration based on new
+	options offered.
+
 2019-09-09  Jose E. Marchesi  <jemarch@gnu.org>
 
 	* config-list.mk (LIST): Disable go in bpf-*-* targets.

contrib/clang-format

@@ -13,16 +13,21 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# clang-format 3.8+ (Mon Nov 16) is required
+# clang-format 7.0.1 is required
 #
 # To utilize the tool to lines just touched by a patch, use
-# clang-format-diff.py script, which can be downloaded here:
-# https://llvm.org/svn/llvm-project/cfe/trunk/tools/clang-format/clang-format-diff.py
+# clang-format-diff script that is usually also packaged with clang-format.
+#
+# Example of usage:
+# git diff -U0 --no-color | clang-format-diff -p1
+# (here the tool will generate a patch)
+# git diff -U0 --no-color | clang-format-diff -p1 -i
+# (modifications are applied)
 
 ---
 Language: Cpp
 AccessModifierOffset: -2
-AlwaysBreakAfterDefinitionReturnType: All
+AlwaysBreakAfterReturnType: TopLevel
 BinPackArguments: true
 BinPackParameters: true
 BraceWrapping:
@@ -37,6 +42,7 @@ BraceWrapping:
   BeforeCatch: true
   BeforeElse: true
   IndentBraces: true
+  SplitEmptyFunction: false
 BreakBeforeBinaryOperators: All
 BreakBeforeBraces: Custom
 BreakBeforeTernaryOperators: true
@@ -136,3 +142,9 @@ SpaceAfterCStyleCast: true
 SpaceBeforeParens: Always
 SpacesBeforeTrailingComments: 1
 UseTab: Always
+AlignEscapedNewlines: Right
+AlignTrailingComments: true
+AllowShortFunctionsOnASingleLine: All
+AlwaysBreakTemplateDeclarations: MultiLine
+KeepEmptyLinesAtTheStartOfBlocks: false
+Standard: Cpp03