expunging implicit mentions of mercurial

handbook/computing/basiclaptop.html

@@ -51,7 +51,7 @@ Note that you are loading your <em>private</em> key, the .ppk file, into pageant
 
 <ul>
 
-<li><a href="../tortoise/putty.html">Installing PuTTy</a>.</li>
+<li><a href="../putty/putty.html">Installing PuTTy</a>.</li>
 <li><a href="winlaptop.html#hard">A Windows laptop for expo</a> - PuTTy and WSL here.</li>
 </ul>
 <p>When using Windows please, please be <a href="http://expo.survex.com/handbook/survey/getin.htm#filenames">excessively 

handbook/computing/keyexchange.html

@@ -16,7 +16,7 @@
 <h2>What do I need to do?</h2>
 <p>You will need to run ssh-keygen/PuTTYgen on your device, email the public key to someone who already has ssh access (Wookey, Paul Fox, Philip Sargent, Sam Wenham). Once installed by them you should be able to log in as 'expo' over ssh (and other software like git will also use this behind the scenes). This only needs doing once (for any machine you want access from).</p>
 
-<p>Our own documentation for <a href="../tortoise/putty.html">installing PuTTy on Windows</a>.
+<p>Our own documentation for <a href="../putty/putty.html">installing PuTTy on Windows</a>.
 
 <p>Explanation of <a href="https://www.ssh.com/ssh/keygen/">key-pairs and the ssh-keygen command</a>.</p>
 

handbook/computing/yourlaptop.html

@@ -139,7 +139,7 @@ to <a href="https://blog.shvetsov.com/2010/03/making-pageant-automatically-load-
 
 <ul>
 
-<li><a href="../tortoise/putty.html">Installing PuTTy on Windows</a>.</li>
+<li><a href="../putty/putty.html">Installing PuTTy on Windows</a>.</li>
 
 <li><a href="../fzconfig.html">Installing Filezilla</a>.</li>