Fix more "allows to" and other typos

Doc/Manual/Guile.html

@@ -183,7 +183,7 @@ information by including a directive like this in the interface file:
 </div>
 
 <p>
-(The <code>%scheme</code> directive allows to insert arbitrary Scheme
+(The <code>%scheme</code> directive allows inserting arbitrary Scheme
 code into the generated file <code><var>module.scm</var></code>; it is
 placed between the <code>define-module</code> form and the
 <code>export</code> form.)

Doc/Manual/Javascript.html

@@ -406,7 +406,7 @@ the main window.</p>
 
 <p>
 As known from <code>node.js</code> one can use <code>require</code> to load javascript modules.
-Additionally, <code>node-webkit</code> provides an API that allows to manipulate the window's menu,
+Additionally, <code>node-webkit</code> provides an API that allows manipulating the window's menu,
 open new windows, and many more things.
 </p>
 

Doc/Manual/SWIG.html

@@ -2020,7 +2020,7 @@ and a more descriptive one, but the two functions are otherwise equivalent:
 <tr>
     <td><span style="white-space: nowrap;"><tt>regex:/pattern/subst/</tt></span></td>
     <td>String after (Perl-like) regex substitution operation. This function
-    allows to apply arbitrary regular expressions to the identifier names. The
+    allows applying arbitrary regular expressions to the identifier names. The
     <i>pattern</i> part is a regular expression in Perl syntax (as supported
     by the <a href="http://www.pcre.org/">Perl Compatible Regular Expressions (PCRE)</a>)
     library and the <i>subst</i> string