clang-format: update.

I tested it against various merge requests and the more I go, the more I
wonder if it will ever be *really* useful. It detects so many false
positive of totally acceptable code. I tweak the style rules, improve
some things but then make other things worse.

Actually the logic of having one "best" case with the penalty system is
flawed IMO. We should really have rules of what is acceptable and should
not trigger changes vs. what is not acceptable styling.
For instance what such a system cannot detect is when we organize some
things on purpose, for instance for semantic reasons. If it's just "best
rule" based, it cannot work, but with an "acceptable style" logic, the
on-purpose organization of code will just pass as long as it doesn't
break the coding style.

Anyway let's see…

.clang-format

@@ -5,6 +5,8 @@
 #
 ---
 
+BasedOnStyle: GNU
+
 AlignAfterOpenBracket: Align
 AlignArrayOfStructures: Left
 AlignConsecutiveAssignments: Consecutive
@@ -12,13 +14,18 @@ AlignConsecutiveDeclarations: Consecutive
 AlignConsecutiveMacros: Consecutive
 AlignEscapedNewlines: Left
 
+AllowAllParametersOfDeclarationOnNextLine: false
 AlwaysBreakAfterReturnType: AllDefinitions
+BinPackParameters: false
 BreakBeforeBraces: GNU
 IndentWidth: 2
-SpaceBeforeParens: Always
 PointerAlignment: Right
 UseTab: Never
 
+SpaceBeforeParens: Always
+SpaceAfterLogicalNot: true
+SpaceAfterCStyleCast: true
+
 # Our column limit is more around 80 characters but we want to avoid
 # this rule to be over-agressive. So for clang-format, let's use a
 # higher limit. Then let's put some biggish penalties on breaking on
@@ -26,9 +33,10 @@ UseTab: Never
 # limits, if clang-format really ends up re-formatting, there might be
 # something better to do code-wise (i.e. we might be in an akwardly
 # over-nested block case).
-ColumnLimit: 100
-PenaltyBreakAssignment: 40
-PenaltyBreakBeforeFirstCallParameter: 40
+ColumnLimit: 80
+PenaltyBreakAssignment: 60
+PenaltyBreakBeforeFirstCallParameter: 100
+PenaltyBreakString: 60
 # Uncomment this when we start using clang-format 14 in the CI.
 # PenaltyBreakOpenParenthesis: 40
 PenaltyExcessCharacter: 1