Emphasize words in documentation with markdown syntax

Author: kimci86

include/SFML/Graphics/Shader.hpp

@@ -932,7 +932,7 @@ class SFML_GRAPHICS_API Shader : GlResource
 /// for SFML.
 ///
 /// Like any C/C++ program, a GLSL shader has its own variables
-/// called \a `uniforms` that you can set from your C++ application.
+/// called _uniforms_ that you can set from your C++ application.
 /// `sf::Shader` handles different types of uniforms:
 /// \li scalars: \p float, \p int, \p bool
 /// \li vectors (2, 3 or 4 components)

include/SFML/Graphics/Shape.hpp

@@ -250,7 +250,7 @@ class SFML_GRAPHICS_API Shape : public Drawable, public Transformable
     /// In other words, this function returns the bounds of the
     /// shape in the global 2D world's coordinate system.
     ///
-    /// This function does not necessarily return the \a `minimal`
+    /// This function does not necessarily return the _minimal_
     /// bounding rectangle. It merely ensures that the returned
     /// rectangle covers all the vertices (but possibly more).
     /// This allows for a fast approximation of the bounds as a