Updated broken links of tutorials in core and fixed weird-looking bullets (error of mine)

doc/tutorials/core/adding_images/adding_images.rst

@@ -8,11 +8,13 @@ Goal
 
 In this tutorial you will learn how to:
 
-* What is *linear blending* and why it is useful.
-* Add two images using :add_weighted:`addWeighted <>`
+.. container:: enumeratevisibleitemswithsquare
 
-Cool Theory
-=================
+   * What is *linear blending* and why it is useful.
+   * Add two images using :add_weighted:`addWeighted <>`
+
+Theory
+=======
 
 .. note::
 
@@ -24,12 +26,12 @@ From our previous tutorial, we know already a bit of *Pixel operators*. An inter
 
    g(x) = (1 - \alpha)f_{0}(x) + \alpha f_{1}(x)
 
-By varying :math:`\alpha` from :math:`0 \rightarrow 1` this operator can be used to perform a temporal *cross-disolve* between two images or videos, as seen in slide shows and film production (cool, eh?)
+By varying :math:`\alpha` from :math:`0 \rightarrow 1` this operator can be used to perform a temporal *cross-disolve* between two images or videos, as seen in slide shows and film productions (cool, eh?)
 
 Code
 =====
 
-As usual, after the not-so-lengthy explanation, let's go to the code. Here it is:
+As usual, after the not-so-lengthy explanation, let's go to the code:
 
 .. code-block:: cpp
 
@@ -116,4 +118,4 @@ Result
 
 .. image:: images/Adding_Images_Tutorial_Result_0.jpg
    :alt: Blending Images Tutorial - Final Result
-   :align: center 
+   :align: center