doc: add editor configuration section with Vim and Emacs settings
based on a patch by Victor Vasiliev, vasilvv gmail com
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@ -207,6 +207,31 @@ Casts should be used only when necessary. Unneeded parentheses
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should also be avoided if they don't make the code easier to understand.
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@end itemize
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@subsection Editor configuration
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In order to configure Vim to follow Libav formatting conventions, paste
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the following snippet into your @file{.vimrc}:
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@example
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" indentation rules for libav: 4 spaces, no tabs
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set expandtab
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set shiftwidth=4
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set softtabstop=4
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" allow tabs in Makefiles
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autocmd FileType make set noexpandtab shiftwidth=8 softtabstop=8
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" Trailing whitespace and tabs are forbidden, so highlight them.
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highlight ForbiddenWhitespace ctermbg=red guibg=red
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match ForbiddenWhitespace /\s\+$\|\t/
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" Do not highlight spaces at the end of line while typing on that line.
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autocmd InsertEnter * match ForbiddenWhitespace /\t\|\s\+\%#\@@<!$/
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@end example
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For Emacs, add these roughly equivalent lines to your @file{.emacs.d/init.el}:
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@example
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(setq c-default-style "k&r")
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(setq-default c-basic-offset 4)
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(setq-default indent-tabs-mode nil)
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(setq-default show-trailing-whitespace t)
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@end example
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@section Development Policy
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@enumerate
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