Fix some grammar errors.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186048 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LanguageExtensions.rst b/docs/LanguageExtensions.rst
index 928b095..d7f46b5 100644
--- a/docs/LanguageExtensions.rst
+++ b/docs/LanguageExtensions.rst
@@ -1961,11 +1961,11 @@
====================
Clang supports additional attributes to enable checking type safety properties
-that can't be enforced by C type system. Usecases include:
+that can't be enforced by the C type system. Use cases include:
* MPI library implementations, where these attributes enable checking that
- buffer type matches the passed ``MPI_Datatype``;
-* for HDF5 library there is a similar usecase as MPI;
+ the buffer type matches the passed ``MPI_Datatype``;
+* for HDF5 library there is a similar use case to MPI;
* checking types of variadic functions' arguments for functions like
``fcntl()`` and ``ioctl()``.
@@ -2000,7 +2000,7 @@
applicable type tags.
This attribute is primarily useful for checking arguments of variadic functions
-(``pointer_with_type_tag`` can be used in most of non-variadic cases).
+(``pointer_with_type_tag`` can be used in most non-variadic cases).
For example: