[command]*`demo_buffer`* open a new buffer::
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/demo_buffer  <name>
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[command]*`demo_info`* get and display an info::
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/demo_info  <info> [<arguments>]

     info: info to display
arguments: optional arguments for info

Without argument, this command displays list of available infos
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[command]*`demo_infolist`* get and display an infolist::
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/demo_infolist  <infolist> [<arguments>]

 infolist: infolist to display
arguments: optional arguments for infolist

Without argument, this command displays list of available infolists
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[command]*`demo_printf`* print some messages on current buffer::
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/demo_printf  <text>

text: write this text
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