[NFC][libc++] Consistently use spaces to indent

rdar://problem/19988944

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@338933 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/numeric b/include/numeric
index b33b6a3..70ef173 100644
--- a/include/numeric
+++ b/include/numeric
@@ -104,15 +104,15 @@
 
 template<class InputIterator, class OutputIterator,
          class BinaryOperation, class UnaryOperation>
-	OutputIterator
-	transform_inclusive_scan(InputIterator first, InputIterator last,
+    OutputIterator
+    transform_inclusive_scan(InputIterator first, InputIterator last,
                              OutputIterator result,
                              BinaryOperation binary_op, UnaryOperation unary_op);  // C++17
 
 template<class InputIterator, class OutputIterator,
          class BinaryOperation, class UnaryOperation, class T>
-	OutputIterator
-	transform_inclusive_scan(InputIterator first, InputIterator last,
+    OutputIterator
+    transform_inclusive_scan(InputIterator first, InputIterator last,
                              OutputIterator result,
                              BinaryOperation binary_op, UnaryOperation unary_op,
                              T init);  // C++17