[NFC] Correct a typo'ed comment and reworded, since it is awkward.

llvm-svn: 324430
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index a5aed29..9ae5a60 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -133,7 +133,7 @@
   setDriverModeFromOption(ClangNameParts.DriverMode);
 
   for (const char *ArgPtr : Args) {
-    // Ingore nullptrs, they are response file's EOL markers
+    // Ignore nullptrs, they are the response file's EOL markers.
     if (ArgPtr == nullptr)
       continue;
     const StringRef Arg = ArgPtr;