fix misspelling in .clang-format

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@289178 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/.clang-format b/.clang-format
index 5fbd330..b708c81 100644
--- a/.clang-format
+++ b/.clang-format
@@ -7,5 +7,5 @@
 
 # Disable formatting options which may break tests.
 SortIncludes: false
-ReflowCommends: false
+ReflowComments: false
 ---