[llvm-cov] Minor visual tweaks for html reports

  - Change the location of the 'Region Coverage' column.
  - Use less css and text for some labels.

llvm-svn: 281145
diff --git a/llvm/tools/llvm-cov/SourceCoverageView.cpp b/llvm/tools/llvm-cov/SourceCoverageView.cpp
index b27782b..23c86e3 100644
--- a/llvm/tools/llvm-cov/SourceCoverageView.cpp
+++ b/llvm/tools/llvm-cov/SourceCoverageView.cpp
@@ -150,7 +150,7 @@
 }
 
 std::string SourceCoverageView::getVerboseSourceName() const {
-  return "Source: " + getSourceName() + " (Binary: " +
+  return getSourceName() + " (Binary: " +
          sys::path::filename(getOptions().ObjectFilename).str() + ")";
 }
 
@@ -169,7 +169,7 @@
 void SourceCoverageView::print(raw_ostream &OS, bool WholeFile,
                                bool ShowSourceName, unsigned ViewDepth) {
   if (WholeFile)
-    renderCellInTitle(OS, "Code Coverage Report");
+    renderCellInTitle(OS, "Coverage Report");
 
   renderViewHeader(OS);