small fixes

index.mdwn

@@ -11,7 +11,7 @@ aforementioned goal.  Copyleft as a concept is usually implemented in the
 details of a specific copyright license, such as the GNU
 [General Public License (GPL)](http://www.gnu.org/copyleft/gpl.html) and the
 [Creative Commons Attribution Share Alike License](http://creativecommons.org/licenses/by-sa/4.0/).
-Copyright holders of creative work can unilaterally implement these licenses
+Copyright holders of creative works can unilaterally choose these licenses
 for their own works to build communities that collaboratively share and
 improve those copylefted creative works.
 
@@ -22,7 +22,7 @@ information, tutorial material, and new policy ideas regarding all forms of
 copyleft licensing.
 
 This site itself is licensed under a copyleft license, and has received
-contributions from experts around the world.  Thus, copyleft.org is the
+contributions from experts around the world. Thus, copyleft.org is the
 premier "meta-project" of copyleft: it's useful copylefted information all
 about copyleft itself!
 
@@ -98,7 +98,7 @@ helpful.)  Here are the primary ones:
 
 As time goes on, we'll add convenience URLs to refer to specific parts of the
 guide, which makes it easy to refer people to portions of the Guide.  Here
-are a the ones that exist so far:
+are the ones that exist so far:
 
   * [compliance.guide/pristine](http://compliance.guide/pristine) points to
     the "pristine example", the chapter entitled *ThinkPenguin Wireless Router: Excellent CCS*.
@@ -113,5 +113,5 @@ Here are a few external resources to read regarding the general concept of copyl
 
   * [Richard M. Stallman's essay on copyleft at gnu.org](https://www.gnu.org/copyleft/)
   * [The Wikipedia entry on Copyleft](http://en.wikipedia.org/wiki/Copyleft)
-    (The definition of copyleft at the top of this page is modified version
+    (The definition of copyleft at the top of this page is a modified version
     of the first paragraph of that Wikipedia entry).