Style: Cleanup uses of double spaces between words

Or after punctuation. Tried to leave third-party stuff alone, unless it has
been heavily modified for Godot.

platform/windows/display_server_windows.cpp

@@ -1891,7 +1891,7 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 				// Run a timer to prevent event catching warning if the focused window is closing.
 				windows[window_id].focus_timer_id = SetTimer(windows[window_id].hWnd, 2, USER_TIMER_MINIMUM, (TIMERPROC) nullptr);
 			}
-			return 0; // Return  To The Message Loop
+			return 0; // Return To The Message Loop
 		}
 		case WM_GETMINMAXINFO: {
 			if (windows[window_id].resizable && !windows[window_id].fullscreen) {