clang-format function definition header. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236390 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Lex/PPExpressions.cpp

@@ -730,8 +730,7 @@ static bool EvaluateDirectiveSubExpr(PPValue &LHS, unsigned MinPrec,
 /// EvaluateDirectiveExpression - Evaluate an integer constant expression that
 /// may occur after a #if or #elif directive.  If the expression is equivalent
 /// to "!defined(X)" return X in IfNDefMacro.
-bool Preprocessor::
-EvaluateDirectiveExpression(IdentifierInfo *&IfNDefMacro) {
+bool Preprocessor::EvaluateDirectiveExpression(IdentifierInfo *&IfNDefMacro) {
   SaveAndRestore<bool> PPDir(ParsingIfOrElifDirective, true);
   // Save the current state of 'DisableMacroExpansion' and reset it to false. If
   // 'DisableMacroExpansion' is true, then we must be in a macro argument list