auctex - 12.2-1 main

AUCTeX is a comprehensive customizable integrated environment for writing
input files for TeX/LaTeX/ConTeXt/Texinfo using GNU Emacs. Currently
XEmacs ships with its own AUCTeX version.
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It supports processing source files by running TeX and related tools
(such as output filters, post processors for generating indices and
bibliographies, and viewers) from inside Emacs. AUCTeX allows browsing
through the errors reported by TeX, while it moves the cursor directly to
the reported error, and displays some documentation for that particular
error. This will even work when the document is spread over several
files.
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AUCTeX can automatically indent LaTeX source, either line by line or for
an entire document, and has a special outline feature which can greatly
assist in getting an overview of a document.
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AUCTeX is written entirely in Emacs Lisp, and may therefore be enhanced
with new features for specific needs. It comes with a large range of
handy Emacs macros. It is a GNU project, and documentation for all its
features is accessible via the Emacs info browser.