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

rdar://problem/19988944

llvm-svn: 338933
diff --git a/libcxx/include/any b/libcxx/include/any
index 9bd2f53..e6e0b6e 100644
--- a/libcxx/include/any
+++ b/libcxx/include/any
@@ -110,7 +110,7 @@
 #ifndef _LIBCPP_NO_EXCEPTIONS
     throw bad_any_cast();
 #else
-	_VSTD::abort();
+    _VSTD::abort();
 #endif
 }