[PATCH] doc: compact installation instructions

[Jan Engelhardt]

* Drop version-specific SO version from source-install command where
  this is not needed.
* Less typing for the user: use zypper short forms.
* Less typing for the user: libtool implies automake implies
  autoconf, so trim the install command.
* Just specify the requirement for a root shell instead of lengthily
  prefixing everything with one specific tool.
  (People might be using, for example, kdesu/gksu.)
---
 doc/building.dox | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/doc/building.dox b/doc/building.dox
index 9bafa32..53829eb 100644
--- a/doc/building.dox
+++ b/doc/building.dox
@@ -59,15 +59,15 @@ $> sudo make uninstall
 @endcode
 
 The following commands reinstall the current system package for libinput,
-overwriting manually installed files.
+overwriting manually installed files. As root, issue:
 
 <ul>
-<li><b>Debian/Ubuntu</b> based distributions: ```sudo apt-get install
+<li><b>Debian/Ubuntu</b> based distributions: ```apt-get install
 --reinstall libinput```</li>
-<li><b>Fedora 22</b> and later: ```sudo dnf reinstall libinput```</li>
-<li><b>RHEL/CentOS/Fedora 21</b> and earlier: ```sudo yum reinstall libinput```</li>
-<li><b>openSUSE</b>: ```sudo zypper install --force libinput10```</li>
-<li><b>Arch</b>: ```sudo packman -S libinput```</li>
+<li><b>Fedora 22</b> and later: ```dnf reinstall libinput```</li>
+<li><b>RHEL/CentOS/Fedora 21</b> and earlier: ```yum reinstall libinput```</li>
+<li><b>openSUSE</b>: ```zypper in -f libinput10```</li>
+<li><b>Arch</b>: ```pacman -S libinput```</li>
 </ul>
 
 @subsection building_dependencies Build dependencies
@@ -75,19 +75,19 @@ overwriting manually installed files.
 libinput has a few build-time dependencies that must be installed prior to
 running configure. In most cases, it is sufficient to install the
 dependencies that your distribution uses to build the libinput package.
-These can be installed with one of the following commands:
+These can be installed with one of the following commands in a root shell:
 
 <ul>
-<li><b>Debian/Ubuntu</b> based distributions: ```sudo apt-get build-dep
+<li><b>Debian/Ubuntu</b> based distributions: ```apt-get build-dep
 libinput```</li>
-<li><b>Fedora 22</b> and later: ```sudo dnf builddep libinput```</li>
-<li><b>RHEL/CentOS/Fedora 21</b> and earlier: ```sudo yum-builddep libinput```</li>
+<li><b>Fedora 22</b> and later: ```dnf builddep libinput```</li>
+<li><b>RHEL/CentOS/Fedora 21</b> and earlier: ```yum-builddep libinput```</li>
 <li><b>openSUSE</b>:
 <pre>
-$> sudo zypper modifyrepo --enable `zypper repos | grep source | awk '{print $5}'`
-$> sudo zypper source-install -d libinput10
-$> sudo zypper install autoconf automake libtool
-$> sudo zypper modifyrepo --disable `zypper repos | grep source | awk '{print $5}'`
+# zypper modifyrepo --enable `zypper repos | grep source | awk '{print $5}'`
+# zypper si -d libinput
+# zypper in libtool
+# zypper modifyrepo --disable `zypper repos | grep source | awk '{print $5}'`
 </pre>
 </li>
 <li><b>Arch</b>:
-- 
2.12.0