[llvm] NFC: fix trivial typos in documents

Reviewers: hans, Jim

Reviewed By: Jim

Subscribers: jvesely, nhaehnle, mgorny, arphaman, bmahjour, kerbowa, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D73017
diff --git a/llvm/docs/CommandGuide/lit.rst b/llvm/docs/CommandGuide/lit.rst
index 40aeecd..ebc0bf2 100644
--- a/llvm/docs/CommandGuide/lit.rst
+++ b/llvm/docs/CommandGuide/lit.rst
@@ -176,7 +176,7 @@
  "shards", and run only one of them.  Must be used with the
  ``--run-shard=N`` option, which selects the shard to run. The environment
  variable ``LIT_NUM_SHARDS`` can also be used in place of this
- option. These two options provide a coarse mechanism for paritioning large
+ option. These two options provide a coarse mechanism for partitioning large
  testsuites, for parallel execution on separate machines (say in a large
  testing farm).