Add recommended hgrc

hgrc

 # This .hgrc is recommended for working on the Adblock Plus project.
 #
 # When using this as your .hgrc as-is, it provides a nicer user interface and
 # enables some extensions that are useful for working on pretty much any
 # project.
 #
-# The commented parts do either not work on all systems, are a matter of taste,
+# The commented parts either do not work on all systems, are a matter of taste,
 # or specific to the Adblock Plus project and might not make sense for everyone.
 # Have a good look and decide for yourself what you want to enable.
 
 ## User interface controls
 [ui]
 
 # Sets your global user name. If you do not uncomment this, you will have to
 # set it on a per-repository basis.
-#username = Jane Bloggs <jane@adblockplus.org>
+#username = Jane Doe <jdoe@example.com>
 
 ## Diff (i.e. patch) format configuration
 [diff]
 
-# We ue Git's extended diff format which includes more information (such as
+# We use Git's extended diff format which includes more information (such as
 # changes to binary files).
 git = true
+
+# Makes diff output include eight lines of context.
+unified = 8
 
 ## Defaults
 #
 # These change the default behaviour of common Mercurial commands.
 [defaults]
 
 # `hg log` shows the history of all branches by default, not just that of the
-# current branch. The `--graph` option shows this as an ASCII tree, which makes
-# the history a lot easier to read.
+# current branch. The `--graph` option shows this as an ASCII tree and marks
+# the revision you are currently at, which makes the history a lot easier to
+# read.
 log = --graph
 
 # The "master" bookmark
 #
 # Most repositories of the Adblock Plus project use bookmarked branches to track
 # multiple lines of development. The bookmark for the main line of development
 # is, by convention, called "master".
 #
 # Unless you are working with Mercurial repositories that do not have a "master"
 # bookmark, it is recommended that you uncomment the following defaults.
 
-# `hg clone` updates to "tip" by default, which is just the latest changeset, on
-# any branch. You most likely want to update to the "master" bookmark instead,
-# which you can do by adding `--updaterev master`. By uncommenting the following
-# line, you won't have to worry about that:
+# `hg clone` updates to the latest changeset on the default branch. When working
+# with repositories that have a "master" branch, you will want to update to that
+# one instead, which you can do by adding `--updaterev master`. By uncommenting
+# the following line, you won't have to worry about that. Note that when
+# enabling this, you can still update to the latest changeset in the default
+# branch by specifying `--updaterev default`.
 #clone = --updaterev master
 
 # `hg push` and `hg outgoing` will by default include all changesets, including
 # bookmarked branches that you might want to just keep locally. To avoid this,
 # you need to add `--rev master`. By uncommenting the following two lines, you
-# won't have to worry about that:
+# won't have to worry about that. Note that when enabling this, you can still
+# push any branch by specifying the `--rev` option.
 #push = --rev master
 #outgoing = --rev master
 
 ## Extensions
 #
 # Mercurial is, out of the box, fairly minimal. A lot of useful functionality
 # comes as extensions. Most of the useful extensions are even part of the
 # default Mercurial distribution, but not enabled by default.
 [extensions]
 
@@ skipping 32 matching lines @@
 
 # Shelve extension, provides the `hg shelve` command that allows you to set
 # pending changes aside, see:
 # https://www.mercurial-scm.org/wiki/ShelveExtension
 shelve =
 
 # Configuration for the pager extension. This doesn't have any effect unless
 # you enable the pager extension above.
 [pager]
 pager = LESS='FSRX' less