Fix typos found by http://github.com/lyda/misspell-check

llvm-svn: 157885
diff --git a/llvm/docs/CommandGuide/lit.rst b/llvm/docs/CommandGuide/lit.rst
index 0073ebe..3eb0be9 100644
--- a/llvm/docs/CommandGuide/lit.rst
+++ b/llvm/docs/CommandGuide/lit.rst
@@ -442,7 +442,7 @@
 ... log message ...
 <log delineator>
 
-where <test name> should be the name of a preceeding reported test, <log
+where <test name> should be the name of a preceding reported test, <log
 delineator> is a string of '\*' characters *at least* four characters long (the
 recommended length is 20), and <trailing delineator> is an arbitrary (unparsed)
 string.