Change default ID name from {x} to _x_.

* I think eyes are just more use to parsing legal identifier characters
  (like _s) rather than {}s syntax. It feels like it's probably more
  readable overall, although there's more of a risk of it blending into
  the names in the original code

renderdoc/driver/shaders/spirv/spirv_disassemble.cpp

@@ -299,7 +299,7 @@ static string OptionalFlagString(EnumType e)
 
 static string DefaultIDName(uint32_t ID)
 {
-	return StringFormat::Fmt("{%u}", ID);
+	return StringFormat::Fmt("_%u_", ID);
 }
 
 template<typename T>

renderdocui/Windows/ShaderViewer.cs

@@ -1034,11 +1034,6 @@ namespace renderdocui.Windows
 
                 string pattern = "\\b" + word + "\\b";
 
-                // if a number is selected, highlight the matching ID
-                uint dummy = 0;
-                if (uint.TryParse(word, out dummy))
-                    pattern = "\\{" + word + "\\}";
-
                 var matches = Regex.Matches(scintilla1.Text, pattern);
 
                 foreach (Match m in matches)