Use light box drawing symbols

src/libutil/util.hh

@@ -459,9 +459,9 @@ void ignoreException();
 
 
 /* Tree formatting. */
-constexpr char treeConn[] = "╠═══";
-constexpr char treeLast[] = "╚═══";
-constexpr char treeLine[] = "║   ";
+constexpr char treeConn[] = "├───";
+constexpr char treeLast[] = "└───";
+constexpr char treeLine[] = "│   ";
 constexpr char treeNull[] = "    ";
 
 

src/nix/why-depends.cc

@@ -152,7 +152,7 @@ struct CmdWhyDepends : SourceExprCommand
             std::cout << fmt("%s%s%s%s" ANSI_NORMAL "\n",
                 firstPad,
                 node.visited ? "\e[38;5;244m" : "",
-                firstPad != "" ? "=> " : "",
+                firstPad != "" ? "→ " : "",
                 pathS);
 
             if (node.path == dependencyPath && !all