[docs] Fixed a typo in Atomics.rst

llvm-svn: 218319

llvm/docs/Atomics.rst

@@ -177,10 +177,10 @@ Unordered
 
 Unordered is the lowest level of atomicity. It essentially guarantees that races
 produce somewhat sane results instead of having undefined behavior.  It also
-guarantees the operation to be lock-free, so it do not depend on the data being
-part of a special atomic structure or depend on a separate per-process global
-lock.  Note that code generation will fail for unsupported atomic operations; if
-you need such an operation, use explicit locking.
+guarantees the operation to be lock-free, so it does not depend on the data
+being part of a special atomic structure or depend on a separate per-process
+global lock.  Note that code generation will fail for unsupported atomic
+operations; if you need such an operation, use explicit locking.
 
 Relevant standard
   This is intended to match the Java memory model for shared variables.