Fix some help file typos.

common/locale/en-US/autocommands.xml

@@ -34,8 +34,8 @@
             commands to be executed when <oa>events</oa> occur for
             pages matching the regular expression <oa>pat</oa>. If
             the <em>-javascript</em> (short name <em>-js</em>)
-            option is given, <oa>cmd</oa> is interperated as
+            option is given, <oa>cmd</oa> is interpreted as
-            JavaScript code. Otherwise, it is interperated as an ex
+            JavaScript code. Otherwise, it is interpreted as an ex
             command.
         </p>
 

common/locale/en-US/buffer.xml

@@ -14,7 +14,7 @@
 <p>
     A buffer the container that holds the given web page, including
     all of its history and frames. Each tab contains exactly one
-    buffer, and for most purposes the two terms are interchangable.
+    buffer, and for most purposes the two terms are interchangeable.
     See <t>tabs</t> for more.
 </p>
 

common/locale/en-US/map.xml

@@ -13,7 +13,7 @@
 
 <p>
     &dactyl.appname; provides a number commands to change the
-    behavior of key presses. This can be mean anythong from
+    behavior of key presses. This can be mean anything from
     automatically substituting one key for another, to automatically
     replacing one typed word for another, to launching a dialog or
     running a command.
@@ -279,7 +279,7 @@
     should note that within angle brackets all alphabetic characters
     are read as lowercase. Uppercase characters can only be
     specified with the <em>S-</em> modifier. The following key
-    sequences are interperated as described,
+    sequences are interpreted as described,
 </p>
 
 <dl>

common/locale/en-US/repeat.xml

@@ -117,10 +117,10 @@
     <description>
         <p>
             Read Ex commands, JavaScript, or CSS from <a>file</a>. Files are
-            interperated based on their extensions. Files when end in
+            interpreted based on their extensions. Files when end in
             <em>.js</em> are executed as JavaScript, while those ending in
             <em>.css</em> are loaded as Cascading Stylesheets, and anything
-            else is interperated as Ex commands. In normal cases, any errors
+            else is interpreted as Ex commands. In normal cases, any errors
             generated by the execution or non-existence of <a>file</a> are
             printed to the <t>command-line</t> area.  When <oa>!</oa> is
             provided, these are suppressed. 

common/locale/en-US/various.xml

@@ -75,7 +75,7 @@
     <spec>:!<a>cmd</a></spec>
     <description>
         <p>
-            Run an extenral command command. Runs <a>cmd</a> through system()
+            Run an external command command. Runs <a>cmd</a> through system()
             and displays its output. Any ‘!’ in <a>cmd</a> is replaced with
             the previous external command, so long as it is not preceded by a
             backslash and <o>banghist</o> is enabled.
@@ -227,7 +227,7 @@
             <em>options</em>, and <em>sitesettings</em>. All other
             domain-specific data is cleared only along with <em>history</em>,
             when a request is made to &dactyl.host; to purge all data for
-            <em>host</em>. Included in this purge are all matchint history
+            <em>host</em>. Included in this purge are all matching history
             entries, cookies, closed tabs, form data, and location bar
             entries.
         </note>