Fix the -opt switch and add a test case for it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51784 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvmc2/llvmc.cpp b/tools/llvmc2/llvmc.cpp
index 560ee98..e073845 100644
--- a/tools/llvmc2/llvmc.cpp
+++ b/tools/llvmc2/llvmc.cpp
@@ -32,8 +32,6 @@
 // Built-in command-line options.
 // External linkage here is intentional.
 
-// TOFIX: Write a 'driver driver' (easier to do as a separate
-// executable that drives llvmc2 proper).
 cl::list<std::string> InputFilenames(cl::Positional, cl::desc("<input file>"),
                                      cl::ZeroOrMore);
 cl::opt<std::string> OutputFilename("o", cl::desc("Output file name"),
@@ -42,7 +40,7 @@
           cl::desc("Specify the language of the following input files"),
           cl::ZeroOrMore);
 cl::opt<bool> DryRun("dry-run",
-                     cl::desc("only pretend to run commands"));
+                     cl::desc("Only pretend to run commands"));
 cl::opt<bool> VerboseMode("v",
                           cl::desc("Enable verbose mode"));
 cl::opt<bool> WriteGraph("write-graph",