Fix various typos.

CHANGELOG.txt

@@ -58,7 +58,7 @@ Other Changes:
 - InputText: On Mac OS X, support Cmd+Shift+Z for Redo. Cmd+Y is also supported as major apps seems to default to support both. (#1765) [@lfnoise]
 - Style: Changed default style.DisplaySafeAreaPadding values from (4,4) to (3,3) so it is smaller than FramePadding and has no effect on main menu bar on a computer. (#1439)
 - Demo: Fixed Overlay: Added a context menu item to enable freely moving the window. 
-- Examples: Allegro 5: Added support for 32-bit indices setup via defining ImDrawIdx, to avoid an unecessary conversion (Allegro 5 doesn't support 16-bit indices).
+- Examples: Allegro 5: Added support for 32-bit indices setup via defining ImDrawIdx, to avoid an unnecessary conversion (Allegro 5 doesn't support 16-bit indices).
 - Examples: Allegro 5: Renamed bindings from imgui_impl_a5.cpp to imgui_impl_allegro5.cpp.
 
 -----------------------------------------------------------------------
@@ -68,7 +68,7 @@ Decorated log: https://github.com/ocornut/imgui/releases/tag/v1.60
 
 The gamepad/keyboard navigation branch (which has been in the work since July 2016) has been merged.
 Gamepad/keyboard navigation is still marked as Beta and has to be enabled explicitly.
-Various internal refactors have also been done, as part of the navigation work and as part of the upcoing viewport/docking work.
+Various internal refactors have also been done, as part of the navigation work and as part of the upcoming viewport/docking work.
 
 Breaking Changes:
 
@@ -77,7 +77,7 @@ Breaking Changes:
  - Reorganized context handling to be more explicit: (#1599)
    - YOU NOW NEED TO CALL ImGui::CreateContext() AT THE BEGINNING OF YOUR APP, AND CALL ImGui::DestroyContext() AT THE END.
    - removed Shutdown() function, as DestroyContext() serve this purpose. If you are using an old back-end from the examples/ folder, remove the line that calls Shutdown().
-   - you may pass a ImFontAtlas* pointer to CreateContext() to share a font atlas between contexts. Otherwhise CreateContext() will create its own font atlas instance.
+   - you may pass a ImFontAtlas* pointer to CreateContext() to share a font atlas between contexts. Otherwise CreateContext() will create its own font atlas instance.
    - removed allocator parameters from CreateContext(), they are now setup with SetAllocatorFunctions(), and shared by all contexts.
    - removed the default global context and font atlas instance, which were confusing for users of DLL reloading and users of multiple contexts.
  - Renamed ImGuiStyleVar_Count_ to ImGuiStyleVar_COUNT and ImGuiMouseCursor_Count_ to ImGuiMouseCursor_COUNT for consistency with other public enums.

imgui.cpp

@@ -124,7 +124,7 @@
     - Call ImGui::NewFrame() to begin the frame
     - You can use any ImGui function you want between NewFrame() and Render()
     - Call ImGui::Render() as late as you can to end the frame and finalize render data. it will call your io.RenderDrawListFn handler.
-       (Even if you don't render, call Render() and ignore the callback, or call EndFrame() instead. Otherwhise some features will break)
+       (Even if you don't render, call Render() and ignore the callback, or call EndFrame() instead. Otherwise some features will break)
  - All rendering information are stored into command-lists until ImGui::Render() is called.
  - Dear ImGui never touches or knows about your GPU state. the only function that knows about GPU is the RenderDrawListFn handler that you provide.
  - Effectively it means you can create widgets at any time in your code, regardless of considerations of being in "update" vs "render" phases 
@@ -272,7 +272,7 @@
  - 2018/02/07 (1.60) - reorganized context handling to be more explicit,
                        - YOU NOW NEED TO CALL ImGui::CreateContext() AT THE BEGINNING OF YOUR APP, AND CALL ImGui::DestroyContext() AT THE END.
                        - removed Shutdown() function, as DestroyContext() serve this purpose.
-                       - you may pass a ImFontAtlas* pointer to CreateContext() to share a font atlas between contexts. Otherwhise CreateContext() will create its own font atlas instance.
+                       - you may pass a ImFontAtlas* pointer to CreateContext() to share a font atlas between contexts. Otherwise CreateContext() will create its own font atlas instance.
                        - removed allocator parameters from CreateContext(), they are now setup with SetAllocatorFunctions(), and shared by all contexts.
                        - removed the default global context and font atlas instance, which were confusing for users of DLL reloading and users of multiple contexts.
  - 2018/01/31 (1.60) - moved sample TTF files from extra_fonts/ to misc/fonts/. If you loaded files directly from the imgui repo you may need to update your paths.
@@ -775,7 +775,7 @@ static void             ImeSetInputScreenPosFn_DefaultImpl(int x, int y);
 // Context
 //-----------------------------------------------------------------------------
 
-// Current context pointer. Implicitely used by all ImGui functions. Always assumed to be != NULL. 
+// Current context pointer. Implicitly used by all ImGui functions. Always assumed to be != NULL.
 // CreateContext() will automatically set this pointer if it is NULL. Change to a different context by calling ImGui::SetCurrentContext(). 
 // If you use DLL hotreloading you might need to call SetCurrentContext() after reloading code from this file. 
 // ImGui functions are not thread-safe because of this pointer. If you want thread-safety to allow N threads to access N different contexts, you can:
@@ -7996,7 +7996,7 @@ bool ImGui::TreeNodeBehaviorIsOpen(ImGuiID id, ImGuiTreeNodeFlags flags)
     if (flags & ImGuiTreeNodeFlags_Leaf)
         return true;
 
-    // We only write to the tree storage if the user clicks (or explicitely use SetNextTreeNode*** functions)
+    // We only write to the tree storage if the user clicks (or explicitly use SetNextTreeNode*** functions)
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = g.CurrentWindow;
     ImGuiStorage* storage = window->DC.StateStorage;

imgui.h

@@ -231,7 +231,7 @@ namespace ImGui
     IMGUI_API void          PushStyleVar(ImGuiStyleVar idx, float val);
     IMGUI_API void          PushStyleVar(ImGuiStyleVar idx, const ImVec2& val);
     IMGUI_API void          PopStyleVar(int count = 1);
-    IMGUI_API const ImVec4& GetStyleColorVec4(ImGuiCol idx);                                // retrieve style color as stored in ImGuiStyle structure. use to feed back into PushStyleColor(), otherwhise use GetColorU32() to get style color with style alpha baked in.
+    IMGUI_API const ImVec4& GetStyleColorVec4(ImGuiCol idx);                                // retrieve style color as stored in ImGuiStyle structure. use to feed back into PushStyleColor(), otherwise use GetColorU32() to get style color with style alpha baked in.
     IMGUI_API ImFont*       GetFont();                                                      // get current font
     IMGUI_API float         GetFontSize();                                                  // get current font size (= height in pixels) of current font with current scale applied
     IMGUI_API ImVec2        GetFontTexUvWhitePixel();                                       // get UV coordinate for a while pixel, useful to draw custom shapes via the ImDrawList API