TextureTools: adapted to the new documentation theme.

src/Magnum/TextureTools/DistanceField.h

@@ -66,15 +66,16 @@ utility.
 For each pixel inside @p rectangle the algorithm looks at corresponding pixel in
 @p input and tries to find nearest pixel of opposite color in area given by
 @p radius. Signed distance between the points is then saved as value of given
-pixel in @p output. Value of `1.0` means that the pixel was originally colored
-white and nearest black pixel is farther than @p radius, value of `0.0` means
+pixel in @p output. Value of 1.0 means that the pixel was originally colored
+white and nearest black pixel is farther than @p radius, value of 0.0 means
 that the pixel was originally black and nearest white pixel is farther than
-@p radius. Values around `0.5` are around edges.
+@p radius. Values around 0.5 are around edges.
 
 The resulting texture can be used with bilinear filtering. It can be converted
-back to binary form in shader using e.g. GLSL `smoothstep()` function with step
-around `0.5` to create antialiased edges. Or you can exploit the distance field
-features to create many other effects. See also @ref Shaders::DistanceFieldVector.
+back to binary form in shader using e.g. GLSL @glsl smoothstep() @ce function
+with step around 0.5 to create antialiased edges. Or you can exploit the
+distance field features to create many other effects. See also
+@ref Shaders::DistanceFieldVector.
 
 Based on: *Chris Green - Improved Alpha-Tested Magnification for Vector Textures
 and Special Effects, SIGGRAPH 2007,