Prefer 'and' over '&' in comments.

Post commit code review feedback from Matt Beaumont-Gay on r174248.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175969 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index dd8906e..e2a18d3 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -144,9 +144,10 @@
       dyn_cast<llvm::BranchInst>(*ReturnBlock.getBlock()->use_begin());
     if (BI && BI->isUnconditional() &&
         BI->getSuccessor(0) == ReturnBlock.getBlock()) {
-      // Reset insertion point, including debug location, and delete the branch.
-      // This is really subtle & only works because the next change in location
-      // will hit the caching in CGDebugInfo::EmitLocation & not override this.
+      // Reset insertion point, including debug location, and delete the
+      // branch.  This is really subtle and only works because the next change
+      // in location will hit the caching in CGDebugInfo::EmitLocation and not
+      // override this.
       Builder.SetCurrentDebugLocation(BI->getDebugLoc());
       Builder.SetInsertPoint(BI->getParent());
       BI->eraseFromParent();