lit: Fix formatting in README.rst
This was preventing lit from being uploaded to pypi.
Reviewed By: mgorny
Differential Revision: https://reviews.llvm.org/D143419
(cherry picked from commit e6d670dc2b528cb981f4ad0d3af1a7d95d447a08)
diff --git a/llvm/utils/lit/README.rst b/llvm/utils/lit/README.rst
index b8befef..3a14570 100644
--- a/llvm/utils/lit/README.rst
+++ b/llvm/utils/lit/README.rst
@@ -41,7 +41,7 @@
ideas on what to work on:
https://github.com/llvm/llvm-project/labels/tools%3Allvm-lit
-Before submitting patches, run the test suite to ensure nothing has regressed:
+Before submitting patches, run the test suite to ensure nothing has regressed::
# From within your LLVM source directory.
utils/lit/lit.py \
