TexInfo export: Using org-manual.org's `kbd' macro problematic for C-{ and C-} keys

[Ramesh Nedunchezian]

As you already know, I am working on creating a info manual for Emacs'
Helm library.  I ran in to a new issue today.

TexInfo export:  Using org-manual.org's `kbd' problematic for C-{ and C-} keys

It may not be a problem with the macro as much.  It is possible that I
am using it wrongly.  How do I get the following snippet DTRT?

Here is the org snippet

    - {{{kbd(C-{)}}} (~helm-enlarge-window~) ::

      #+findex: helm-enlarge-window

      #+kindex: C-{

      Enlarge helm window.

    - {{{kbd(C-})}}} (~helm-narrow-window~) ::

      #+findex: helm-narrow-window

      #+kindex: C-}

      Narrow helm window.