Fix version check and compilation on Windows; "the Enter" => "the Ent…

…er key"

doc/C/qalculate-gtk.xml

@@ -106,7 +106,7 @@ After execution of an expression, the whole expression will be marked. This norm
 The <keycap>Page Up</keycap> and <keycap>Page Down</keycap> keys will access previously entered expressions. With focus in the expression entry, <keycap>Page Up</keycap> traverses backwards in the expression history and <keycap>Page Down</keycap> forward. The <keycap>Up</keycap> and <keycap>Down</keycap> can also be used for the same purpose when the completion list is not shown.
 </para>
 <para>
-Although the expression entry can display multiple lines of text, the <keycap>Enter</keycap> does not insert a line feed. New lines are automatically created when needed.
+Although the expression entry can display multiple lines of text, the <keycap>Enter</keycap> key does not insert a line feed. New lines are automatically created when needed.
 </para>
 <para>
 The font used for the expression entry can be selected in the preferences dialog (<menuchoice><guimenu>Edit</guimenu><guimenuitem>Preferences</guimenuitem></menuchoice>).

doc/html/qalculate-user-interface.html

@@ -11,7 +11,7 @@
 </p><p>
 The <span class="keycap"><strong>Page Up</strong></span> and <span class="keycap"><strong>Page Down</strong></span> keys will access previously entered expressions. With focus in the expression entry, <span class="keycap"><strong>Page Up</strong></span> traverses backwards in the expression history and <span class="keycap"><strong>Page Down</strong></span> forward. The <span class="keycap"><strong>Up</strong></span> and <span class="keycap"><strong>Down</strong></span> can also be used for the same purpose when the completion list is not shown.
 </p><p>
-Although the expression entry can display multiple lines of text, the <span class="keycap"><strong>Enter</strong></span> does not insert a line feed. New lines are automatically created when needed.
+Although the expression entry can display multiple lines of text, the <span class="keycap"><strong>Enter</strong></span> key does not insert a line feed. New lines are automatically created when needed.
 </p><p>
 The font used for the expression entry can be selected in the preferences dialog (<span class="guimenu">Edit</span> → <span class="guimenuitem">Preferences</span>).
 </p></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="qalculate-result-display"></a>Result Display</h2></div></div></div><p>