Clarify support for "%s" shortcuts in functions taking format strings. (#9404, #3466, #6846)

Author: ocornut

imgui.h

@@ -613,7 +613,8 @@ namespace ImGui
     IMGUI_API ImGuiID       GetID(int int_id);
 
     // Widgets: Text
-    IMGUI_API void          TextUnformatted(const char* text, const char* text_end = NULL); // raw text without formatting. Roughly equivalent to Text("%s", text) but: A) doesn't require null terminated string if 'text_end' is specified, B) it's faster, no memory copy is done, no buffer size limits, recommended for long chunks of text.
+    // - Note that all functions taking format strings in the API may be passed ("%s", text) or ("%.*s", text_len, text): which will automatically bypass the formatter.
+    IMGUI_API void          TextUnformatted(const char* text, const char* text_end = NULL); // raw text without formatting. Practically equivalent to 'Text("%s", text)' but doesn't require null terminated string if 'text_end' is specified.
     IMGUI_API void          Text(const char* fmt, ...)                                      IM_FMTARGS(1); // formatted text
     IMGUI_API void          TextV(const char* fmt, va_list args)                            IM_FMTLIST(1);
     IMGUI_API void          TextColored(const ImVec4& col, const char* fmt, ...)            IM_FMTARGS(2); // shortcut for PushStyleColor(ImGuiCol_Text, col); Text(fmt, ...); PopStyleColor();

imgui_widgets.cpp

@@ -266,6 +266,8 @@ void ImGui::TextEx(const char* text, const char* text_end, ImGuiTextFlags flags)
     }
 }
 
+// Note that all functions taking format strings in the API may be passed ("%s", text) or ("%.*s", text_len, text),
+// which will automatically bypass the formatter.
 void ImGui::TextUnformatted(const char* text, const char* text_end)
 {
     TextEx(text, text_end, ImGuiTextFlags_NoWidthForLargeClippedText);