[sanitizer-coverage] fix docs

llvm-svn: 282962
diff --git a/clang/docs/SanitizerCoverage.rst b/clang/docs/SanitizerCoverage.rst
index 19d8e4f..8654b1d 100644
--- a/clang/docs/SanitizerCoverage.rst
+++ b/clang/docs/SanitizerCoverage.rst
@@ -131,6 +131,7 @@
 to produce a ``.symcov`` file first:
 
 .. code-block:: console
+
     sancov -symbolize my_program.123.sancov my_program > my_program.123.symcov
 
 The ``.symcov`` file can be browsed overlayed over the source code by