update sprite class's private member var comments, remove extraneous quotes from texture log message

src/Sprite.hpp

@@ -29,11 +29,13 @@ namespace sb
 
     private:
 
-        /* The plane is included using composition instead of inheritance, allowing the user to define a custom plane. */
+        /* The plane is a class member rather than the class's inherited type, allowing the user to define a custom plane. When the sprite is copied,
+         * the plane is copied with its references to GPU memory preserved. */
         sb::Plane plane;
 
-        /* Keep a reference of the matrix transformations generated when the user applies a transformation, so that each can be reapplied
-         * without having to set all the transformations every time one is changed. */
+        /* Keep a copy of the matrix transformations generated when the user applies a transformation, so that each can be reapplied
+         * without having to set all the transformations every time one is changed. When the sprite is copied, the transformation values are
+         * copied to the new object, so the new sprite can alter the transformations independently. */
         glm::mat4 _scale {1.0f}, _translation {1.0f}, _rotation {1.0f};
 
         /* A sprite by definition has only one texture per draw, so keep an index to the currently active texture. */

src/Texture.cpp

@@ -165,7 +165,7 @@ void Texture::bind() const
         message << "Cannot bind texture that has not been generated yet.";
         if (!path.empty())
         {
-            message << " Texture path is \"" << path << "\".";
+            message << " Texture path is " << path << ".";
         }
         throw std::runtime_error(message.str());
     }