Fix typos pointed out by Mael

Author: lrineau

Installation/CHANGES

@@ -1,4 +1,3 @@
-
 -------------------------------- Release 4.7 --------------------------------
 
 Release date: October 2015
@@ -17,7 +16,7 @@ Release date: October 2015
     source edition it should be /path-to/qt-everywhere-opensource-src-
     <version>/qtbase/lib/cmake/Qt5.
 
-  - The code of the 3D demos now use modern OpenGL, with shaders, instead of
+  - The code of the 3D demos now uses modern OpenGL, with shaders, instead of
     the fixed pipeline API of OpenGL-1.
 
   - The Microsoft Windows Visual C++ compiler 2015 (VC14) is now supported.
@@ -100,9 +99,9 @@ Release date: October 2015
 
   - This package now supports any model of the concept FaceGraph.
 
-  - Breaking change: The package no longer support models of
-    TriangulatedSurfaceMesh which are not at the same time model of the concept
-    FaceGraph.
+  - Breaking change: The package no longer supports models of
+    TriangulatedSurfaceMesh which are not at the same time models of the
+    concept FaceGraph.
 
 
 * dD Geometry Kernel
@@ -124,7 +123,7 @@ Release date: October 2015
       - The existing ArrangementLandmarkTraits_2 concept, which has two
         requirements, now refines the two respective concepts above.
 
-      - The template parameter of the exsting
+      - The template parameter of the existing
         Arr_polyline_traits_2<SegmentTraits> template must be substituted with
         a traits class that is a model of the
         ArrangementConstructXMonotoneTraits_2 concept among the other when
@@ -179,7 +178,7 @@ Release date: October 2015
     the function CGAL::vcm_is_on_feature_edge() to determine whether a point is
     on or close to a feature edge. The former function is also internally used
     by CGAL::vcm_estimate_normals() to estimate the normals of a point set and
-    it is particularly suited to point set with noise.
+    it is particularly suited to point sets with noise.
 
 
 * Spatial Sorting

Installation/changes.html

@@ -166,7 +166,7 @@ <h3>Installation</h3>
       edition it should be
     <code>/path-to/qt-everywhere-opensource-src-&lt;version&gt;/qtbase/lib/cmake/Qt5</code>.
     </li>
-    <li>The code of the 3D demos now use modern OpenGL, with shaders,
+    <li>The code of the 3D demos now uses modern OpenGL, with shaders,
     instead of the fixed pipeline API of OpenGL-1.</li>
     <li>The Microsoft Windows Visual C++ compiler 2015 (VC14) is now
       supported.  However, since this compiler is not officially supported
@@ -267,9 +267,9 @@ <h3>Approximation of Ridges and Umbilics on Triangulated Surface Meshes</h3>
   <ul>
     <li> This package now supports any model of the
       concept <code>FaceGraph</code>.
-    <li> <b>Breaking change:</b> The package no longer support models
+    <li> <b>Breaking change:</b> The package no longer supports models
       of <code>TriangulatedSurfaceMesh</code> which are not at the same
-      time model of the concept <code>FaceGraph</code>.
+      time models of the concept <code>FaceGraph</code>.
     </li>
   </ul>
 
@@ -296,7 +296,7 @@ <h3>2D Arrangements</h3>
 	<li>The existing <code>ArrangementLandmarkTraits_2</code> concept,
 	  which has two requirements, now refines the two respective
 	  concepts above.</li>
-	<li>The template parameter of the exsting
+	<li>The template parameter of the existing
 	  <code>Arr_polyline_traits_2&lt;SegmentTraits&gt;</code> template
 	  must be substituted with a traits class that is a model of
 	  the <code>ArrangementConstructXMonotoneTraits_2</code> concept
@@ -363,7 +363,7 @@ <h3>Point Set Processing and Surface Reconstruction from Point Sets</h3>
       whether a point is on or close to a feature edge. The former function
       is also internally used by <code>CGAL::vcm_estimate_normals()</code>
       to estimate the normals of a point set and it is particularly suited
-      to point set with noise.
+      to point sets with noise.
     </li>
   </ul>