help: markup email addresses as inline literals

Otherwise we get useless links to [e-mail] in the HTML version
of the man pages.

help/environment.txt

@@ -1,76 +1,76 b''
 HG
     Path to the 'hg' executable, automatically passed when running
     hooks, extensions or external tools. If unset or empty, this is
     the hg executable's name if it's frozen, or an executable named
     'hg' (with %PATHEXT% [defaulting to COM/EXE/BAT/CMD] extensions on
     Windows) is searched.
 
 HGEDITOR
     This is the name of the editor to run when committing. See EDITOR.
 
     (deprecated, use .hgrc)
 
 HGENCODING
     This overrides the default locale setting detected by Mercurial.
     This setting is used to convert data including usernames,
     changeset descriptions, tag names, and branches. This setting can
     be overridden with the --encoding command-line option.
 
 HGENCODINGMODE
     This sets Mercurial's behavior for handling unknown characters
     while transcoding user input. The default is "strict", which
     causes Mercurial to abort if it can't map a character. Other
     settings include "replace", which replaces unknown characters, and
     "ignore", which drops them. This setting can be overridden with
     the --encodingmode command-line option.
 
 HGMERGE
     An executable to use for resolving merge conflicts. The program
     will be executed with three arguments: local file, remote file,
     ancestor file.
 
     (deprecated, use .hgrc)
 
 HGRCPATH
     A list of files or directories to search for hgrc files. Item
     separator is ":" on Unix, ";" on Windows. If HGRCPATH is not set,
     platform default search path is used. If empty, only the .hg/hgrc
     from the current repository is read.
 
     For each element in HGRCPATH:
 
     - if it's a directory, all files ending with .rc are added
     - otherwise, the file itself will be added
 
 HGUSER
     This is the string used as the author of a commit. If not set,
     available values will be considered in this order:
 
     - HGUSER (deprecated)
     - hgrc files from the HGRCPATH
     - EMAIL
     - interactive prompt
-    - LOGNAME (with '@hostname' appended)
+    - LOGNAME (with ``@hostname`` appended)
 
     (deprecated, use .hgrc)
 
 EMAIL
     May be used as the author of a commit; see HGUSER.
 
 LOGNAME
     May be used as the author of a commit; see HGUSER.
 
 VISUAL
     This is the name of the editor to use when committing. See EDITOR.
 
 EDITOR
     Sometimes Mercurial needs to open a text file in an editor for a
     user to modify, for example when writing commit messages. The
     editor it uses is determined by looking at the environment
     variables HGEDITOR, VISUAL and EDITOR, in that order. The first
     non-empty one is chosen. If all of them are empty, the editor
     defaults to 'vi'.
 
 PYTHONPATH
     This is used by Python to find imported modules and may need to be
     set appropriately if this Mercurial is not installed system-wide.

help/templates.txt

@@ -1,113 +1,113 b''
 Mercurial allows you to customize output of commands through
 templates. You can either pass in a template from the command
 line, via the --template option, or select an existing
 template-style (--style).
 
 You can customize output for any "log-like" command: log,
 outgoing, incoming, tip, parents, heads and glog.
 
 Three styles are packaged with Mercurial: default (the style used
 when no explicit preference is passed), compact and changelog.
 Usage::
 
     $ hg log -r1 --style changelog
 
 A template is a piece of text, with markup to invoke variable
 expansion::
 
     $ hg log -r1 --template "{node}\n"
     b56ce7b07c52de7d5fd79fb89701ea538af65746
 
 Strings in curly braces are called keywords. The availability of
 keywords depends on the exact context of the templater. These
 keywords are usually available for templating a log-like command:
 
 :author:    String. The unmodified author of the changeset.
 :branches:  String. The name of the branch on which the changeset
             was committed. Will be empty if the branch name was
             default.
 :date:      Date information. The date when the changeset was
             committed.
 :desc:      String. The text of the changeset description.
 :diffstat:  String. Statistics of changes with the following
             format: "modified files: +added/-removed lines"
 :files:     List of strings. All files modified, added, or removed
             by this changeset.
 :file_adds: List of strings. Files added by this changeset.
 :file_mods: List of strings. Files modified by this changeset.
 :file_dels: List of strings. Files removed by this changeset.
 :node:      String. The changeset identification hash, as a
             40-character hexadecimal string.
 :parents:   List of strings. The parents of the changeset.
 :rev:       Integer. The repository-local changeset revision
             number.
 :tags:      List of strings. Any tags associated with the
             changeset.
 :latesttag: String. Most recent global tag in the ancestors of this
             changeset.
 :latesttagdistance: Integer. Longest path to the latest tag.
 
 The "date" keyword does not produce human-readable output. If you
 want to use a date in your output, you can use a filter to process
 it. Filters are functions which return a string based on the input
 variable. You can also use a chain of filters to get the desired
 output::
 
    $ hg tip --template "{date|isodate}\n"
    2008-08-21 18:22 +0000
 
 List of filters:
 
 :addbreaks:   Any text. Add an XHTML "<br />" tag before the end of
               every line except the last.
 :age:         Date. Returns a human-readable date/time difference
               between the given date/time and the current
               date/time.
 :basename:    Any text. Treats the text as a path, and returns the
               last component of the path after splitting by the
               path separator (ignoring trailing separators). For
               example, "foo/bar/baz" becomes "baz" and "foo/bar//"
               becomes "bar".
 :stripdir:    Treat the text as path and strip a directory level,
               if possible. For example, "foo" and "foo/bar" becomes
               "foo".
 :date:        Date. Returns a date in a Unix date format, including
               the timezone: "Mon Sep 04 15:13:13 2006 0700".
 :domain:      Any text. Finds the first string that looks like an
               email address, and extracts just the domain
-              component. Example: 'User <[e-mail]>' becomes
-              'example.com'.
+              component. Example: ``User <[e-mail]>`` becomes
+              ``example.com``.
 :email:       Any text. Extracts the first string that looks like
-              an email address. Example: 'User <[e-mail]>'
-              becomes '[e-mail]'.
+              an email address. Example: ``User <[e-mail]>``
+              becomes ``[e-mail]``.
 :escape:      Any text. Replaces the special XML/XHTML characters
               "&", "<" and ">" with XML entities.
 :fill68:      Any text. Wraps the text to fit in 68 columns.
 :fill76:      Any text. Wraps the text to fit in 76 columns.
 :firstline:   Any text. Returns the first line of text.
 :nonempty:    Any text. Returns '(none)' if the string is empty.
 :hgdate:      Date. Returns the date as a pair of numbers:
               "1157407993 25200" (Unix timestamp, timezone offset).
 :isodate:     Date. Returns the date in ISO 8601 format:
               "2009-08-18 13:00 +0200".
 :isodatesec:  Date. Returns the date in ISO 8601 format, including
               seconds: "2009-08-18 13:00:13 +0200". See also the
               rfc3339date filter.
 :localdate:   Date. Converts a date to local date.
 :obfuscate:   Any text. Returns the input text rendered as a
               sequence of XML entities.
 :person:      Any text. Returns the text before an email address.
 :rfc822date:  Date. Returns a date using the same format used in
               email headers: "Tue, 18 Aug 2009 13:00:13 +0200".
 :rfc3339date: Date. Returns a date using the Internet date format
               specified in RFC 3339: "2009-08-18T13:00:13+02:00".
 :short:       Changeset hash. Returns the short form of a changeset
               hash, i.e. a 12-byte hexadecimal string.
 :shortdate:   Date. Returns a date like "2006-09-18".
 :strip:       Any text. Strips all leading and trailing whitespace.
 :tabindent:   Any text. Returns the text, with every line except
               the first starting with a tab character.
 :urlescape:   Any text. Escapes all "special" characters. For
               example, "foo bar" becomes "foo%20bar".
 :user:        Any text. Returns the user portion of an email
               address.