[main] make 3rd argument of ROOT::CmdLine::NodeFullPath explicit

There is really no point in having it implicit and for clarity of
intention it's better to spell it out.

Author: silverweed

main/src/RootObjTree.hxx

@@ -69,8 +69,7 @@ enum class ENodeFullPathOpt {
    kIncludeFilename,
 };
 /// Given a node, returns its full path. If `opt == kIncludeFilename`, the path is prepended by "filename.root:"
-std::string
-NodeFullPath(const RootObjTree &tree, NodeIdx_t nodeIdx, ENodeFullPathOpt opt = ENodeFullPathOpt::kExcludeFilename);
+std::string NodeFullPath(const RootObjTree &tree, NodeIdx_t nodeIdx, ENodeFullPathOpt opt);
 
 struct RootSource {
    std::string fFileName;

main/src/rootcp.cxx

@@ -183,7 +183,7 @@ static void CopyNode(const RootSource &src, const RootCpDestination &dest, NodeI
    // Similarly, nodeIdx must be in range because it always comes from a RootObjTree.
    assert(nodeIdx < src.fObjectTree.fNodes.size());
    const RootObjNode &node = src.fObjectTree.fNodes[nodeIdx];
-   const std::string srcFullPath = NodeFullPath(src.fObjectTree, nodeIdx);
+   const std::string srcFullPath = NodeFullPath(src.fObjectTree, nodeIdx, ENodeFullPathOpt::kExcludeFilename);
    // Directory path, excluding trailing '/' and without the "file.root:" prefix.
    const std::string_view srcDirPath =
       (node.fParent == 0) ? std::string_view{}

main/src/rootls.cxx

@@ -530,7 +530,7 @@ static void RootLs(const RootLsArgs &args, std::ostream &stream = std::cout)
       for (NodeIdx_t rootIdx : source.fObjectTree.fDirList) {
          if (manySources) {
             PrintIndent(stream, outerIndent);
-            stream << NodeFullPath(source.fObjectTree, rootIdx) << " :\n";
+            stream << NodeFullPath(source.fObjectTree, rootIdx, ENodeFullPathOpt::kExcludeFilename) << " :\n";
          }
 
          if (args.fFlags & (RootLsArgs::kLongListing | RootLsArgs::kTreeListing | RootLsArgs::kRNTupleListing))