Complete comment. Reflow conditional.

llvm-svn: 234083
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index d96c294..6f8751d 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -750,9 +750,8 @@
     Features.push_back("-crypto");
   }
 
-  // En/disable crc
-  if (Arg *A = Args.getLastArg(options::OPT_mcrc,
-                               options::OPT_mnocrc)) {
+  // En/disable crc code generation.
+  if (Arg *A = Args.getLastArg(options::OPT_mcrc, options::OPT_mnocrc)) {
     if (A->getOption().matches(options::OPT_mcrc))
       Features.push_back("+crc");
     else