tiny adjustments

content/community.txt

@@ -11,7 +11,7 @@ further development.  You can use it in various ways:
 - .. raw:: html
 
      <form method=post action="https://mailman-mail5.webfaction.com/subscribe/kwant-discuss">
-     <input type="text" name="email" size=25 value="Your email" onblur="if (this.value == '') {this.value='Your email'}" onfocus="if (this.value == 'Your email') {this.value=''}" />
+     <input type="text" name="email" size=25 value="Your email address" onblur="if (this.value == '') {this.value='Your email address'}" onfocus="if (this.value == 'Your email address') {this.value=''}" />
      <input type="submit" name="email-button" value="Subscribe to the mailing list" />
      </form>
 
@@ -45,7 +45,7 @@ Kwant to subscribe to it in order to stay informed about new developments.
 .. raw:: html
 
    <form method=post action="https://mailman-mail5.webfaction.com/subscribe/kwant-announce">
-   <input type="text" name="email" size=25 value="Your email" onblur="if (this.value == '') {this.value='Your email'}" onfocus="if (this.value == 'Your email') {this.value=''}" />
+   <input type="text" name="email" size=25 value="Your email address" onblur="if (this.value == '') {this.value='Your email address'}" onfocus="if (this.value == 'Your email address') {this.value=''}" />
    <input type="submit" name="email-button" value="Subscribe to announcements" />
    </form>
 

content/install.txt

@@ -6,7 +6,7 @@ The quickest and easiest way to install Kwant is using the prepared packages
 that are available for `Windows`_, GNU/Linux (`Debian
 <#debian-and-derivatives>`_ or `Ubuntu <#ubuntu-and-derivatives>`_, and their
 variants), and `Mac OS X`_.  It is possible to be notified about new releases
-of Kwant through a `mailing list
+of Kwant through an `announcement mailing list
 <community.html#announcements-of-new-releases>`_.
 
 If no packages are available for the system you use, or if you would like to