Misc tweaks, comments.

Author: ocornut

docs/CHANGELOG.txt

@@ -62,7 +62,8 @@ Other changes:
 - Debug Tools: Debug Log: Added "Configure Outputs.." button. (#5855)
 - Backends: SDL3: Update for API changes: SDLK_x renames and SDLK_KP_x removals (#7761, #7762)
 - Backends: SDL2,SDL3,OSX: Update for io.SetPlatformImeDataFn() -> io.PlatformSetImeDataFn() rename.
-- Backends: GLFW,SDL2: Added ioPlatformOpenInShellFn handler for web/Emscripten versions. (#7660)
+- Backends: GLFW,SDL2: Added io.PlatformOpenInShellFn handler for web/Emscripten versions. (#7660)
+  [@ypujante, @ocornut]
 
 
 -----------------------------------------------------------------------

imgui.cpp

@@ -2054,6 +2054,10 @@ void ImFormatStringToTempBuffer(const char** out_buf, const char** out_buf_end,
     va_end(args);
 }
 
+// FIXME: Should rework API toward allowing multiple in-flight temp buffers (easier and safer for caller)
+// by making the caller acquire a temp buffer token, with either explicit or destructor release, e.g.
+//  ImGuiTempBufferToken token;
+//  ImFormatStringToTempBuffer(token, ...);
 void ImFormatStringToTempBufferV(const char** out_buf, const char** out_buf_end, const char* fmt, va_list args)
 {
     ImGuiContext& g = *GImGui;

imgui_demo.cpp

@@ -7755,7 +7755,7 @@ static void ShowPlaceholderObject(const char* prefix, int uid)
     ImGui::TableNextRow();
     ImGui::TableSetColumnIndex(0);
     ImGui::AlignTextToFramePadding();
-    bool node_open = ImGui::TreeNode("Object", "%s_%u", prefix, uid);
+    bool node_open = ImGui::TreeNode("##Object", "%s_%u", prefix, uid);
     ImGui::TableSetColumnIndex(1);
     ImGui::Text("my sailor is rich");
 

imgui_internal.h

@@ -965,8 +965,8 @@ enum ImGuiSelectableFlagsPrivate_
 // Extend ImGuiTreeNodeFlags_
 enum ImGuiTreeNodeFlagsPrivate_
 {
-    ImGuiTreeNodeFlags_ClipLabelForTrailingButton = 1 << 20,
-    ImGuiTreeNodeFlags_UpsideDownArrow            = 1 << 21,// (FIXME-WIP) Turn Down arrow into an Up arrow, but reversed trees (#6517)
+    ImGuiTreeNodeFlags_ClipLabelForTrailingButton = 1 << 28,// FIXME-WIP: Hard-coded for CollapsingHeader()
+    ImGuiTreeNodeFlags_UpsideDownArrow            = 1 << 29,// FIXME-WIP: Turn Down arrow into an Up arrow, but reversed trees (#6517)
 };
 
 enum ImGuiSeparatorFlags_