minor edits to account for Andreas' comments: changed 'allows' to 'enables'; most files were already in svg format

Periodic_4_hyperbolic_triangulation_2/doc/Periodic_4_hyperbolic_triangulation_2/CGAL/Periodic_4_hyperbolic_Delaunay_triangulation_2.h

@@ -8,7 +8,7 @@ namespace CGAL {
 /*!
 \ingroup PkgPeriodic4HyperbolicTriangulation2MainClasses
 
-The class `Periodic_4_hyperbolic_Delaunay_triangulation_2` allows the construction and
+The class `Periodic_4_hyperbolic_Delaunay_triangulation_2` enables the construction and
 handling of Delaunay triangulations of the Bolza surface. 
 
 The class expects two template parameters.

Periodic_4_hyperbolic_triangulation_2/doc/Periodic_4_hyperbolic_triangulation_2/Concepts/Periodic_4HyperbolicTriangulationTraits_2.h

@@ -11,7 +11,7 @@ The concept `Periodic_4HyperbolicTriangulationTraits_2` describes the set of req
 to be fulfilled by any class used to instantiate the first template parameter of the class 
 `CGAL::Periodic_4_hyperbolic_triangulation_2`. In addition to the geometric types and the 
 operations defined on them in `HyperbolicDelaunayTriangulationTraits_2`, it defines the 
-hyperbolic translations that allow to encode the periodicity of the triangulation.
+hyperbolic translations that enable the encoding of the periodicity of the triangulation.
 
 The concept requires that the field number type `FT` defined in the concept 
 `HyperbolicDelaunayTriangulationTraits_2` supports exact computations with algebraic numbers, 

Periodic_4_hyperbolic_triangulation_2/doc/Periodic_4_hyperbolic_triangulation_2/PackageDescription.txt

@@ -24,7 +24,7 @@
  
 \cgalPkgSummaryBegin
 \cgalPkgAuthor{Iordan Iordanov and Monique Teillaud}
-\cgalPkgDesc{This package allows to build and handle triangulations of point sets on the two dimensional
+\cgalPkgDesc{This package enables building and handling triangulations of point sets on the two dimensional
 hyperbolic Bolza surface. Triangulations are built incrementally and can be modified by insertion or
 removal of vertices. Point location facilities are also offered. The package provides Delaunay
 triangulations and offers primitives to build the dual Voronoi diagrams.}
@@ -73,7 +73,7 @@ the hyperbolic plane.
 - `CGAL::Periodic_4_hyperbolic_triangulation_2` gives access 
 to the elements of the triangulation (vertices, edges, and faces), and functionality common to 
 triangulations in general, such as point location. This class does <i>not</i> support insertion or removal of points.
-- `CGAL::Periodic_4_hyperbolic_Delaunay_triangulation_2` allows to construct and modify Delaunay triangulations of the Bolza surface.
+- `CGAL::Periodic_4_hyperbolic_Delaunay_triangulation_2` enables the construction and modification of Delaunay triangulations of the Bolza surface.
 - `CGAL::Periodic_4_hyperbolic_Delaunay_triangulation_traits_2` is a model for the concept `Periodic_4HyperbolicDelaunayTriangulationTraits_2`.
 - `CGAL::Periodic_4_hyperbolic_triangulation_face_base_2` is a model of the concept `Periodic_4HyperbolicTriangulationFaceBase_2` and represents a face of the triangulation.
 - `CGAL::Periodic_4_hyperbolic_triangulation_vertex_base_2` is a model of the concept `Periodic_4HyperbolicTriangulationVertexBase_2` and represents a vertex of the triangulation.

Periodic_4_hyperbolic_triangulation_2/doc/Periodic_4_hyperbolic_triangulation_2/Periodic_4_hyperbolic_triangulation_2.txt

@@ -16,7 +16,7 @@ namespace CGAL {
 </center>
 
 
-This package allows to compute Delaunay triangulations of the Bolza surface, which is the
+This package enables the computation of Delaunay triangulations of the Bolza surface, which is the
 most symmetric surface of genus 2. The Bolza surface is a hyperbolic closed compact orientable surface. 
 
 A triangulation of the Bolza surface can be seen as a periodic