Add mathjax tag and description fm to equation tests

test/site/content-org/all-posts.org

@@ -2732,12 +2732,15 @@ C = W\log_{2} (1+\mathrm{SNR})
 \end{equation}
 
 *Here we refer to equation \ref{eq:1}.*
-* Equations                                                       :equations:
+* Equations                                               :equations:mathjax:
 ** Inline equations
 :PROPERTIES:
 :EXPORT_FILE_NAME: equation-latex-frag
 :EXPORT_DATE: 2017-07-31
 :END:
+#+begin_description
+Inline and /one-per-line/ equations
+#+end_description
 - Inline equations are wrapped between =\(= and =\)=.
   - =$= wrapping also works, but it is not preferred as it comes with
     restrictions like "there should be no whitespace between the
@@ -2781,6 +2784,10 @@ $$ a=+\sqrt{2} $$ or \[ a=-\sqrt{2} \]
 :PROPERTIES:
 :EXPORT_FILE_NAME: equations-with-r-c
 :END:
+#+begin_description
+Test to check that ®, © and ™ don't get interpreted
+within equations.
+#+end_description
 {{{oxhugoissue(104)}}}
 
 Below, =(r)= or =(R)= should not get converted to ®, =(c)= or
@@ -2809,6 +2816,9 @@ $$ (tm) (TM) $$
 :PROPERTIES:
 :EXPORT_FILE_NAME: indented-equations
 :END:
+#+begin_description
+Testing equations with mathjax --- indented or not.
+#+end_description
 *** No indentation
 \begin{equation}
 \label{eq:1}
@@ -2834,6 +2844,9 @@ one, but:
 :PROPERTIES:
 :EXPORT_FILE_NAME: equations-bf-escaping
 :END:
+#+begin_description
+Test to check that the backslashes are correctly escaped.
+#+end_description
 {{{oxhugoissue(138)}}}
 *** =\|= → =\\|=
 $$

test/site/content/posts/equation-latex-frag.md

@@ -1,7 +1,8 @@
 +++
 title = "Inline equations"
+description = "Inline and _one-per-line_ equations"
 date = 2017-07-31
-tags = ["equations"]
+tags = ["equations", "mathjax"]
 draft = false
 +++
 

test/site/content/posts/equations-bf-escaping.md

@@ -1,6 +1,7 @@
 +++
 title = "Blackfriday-specific escaping in equations"
-tags = ["equations", "escaping", "blackfriday"]
+description = "Test to check that the backslashes are correctly escaped."
+tags = ["equations", "mathjax", "escaping", "blackfriday"]
 categories = ["upstream"]
 draft = false
 +++

test/site/content/posts/equations-with-r-c.md

@@ -1,6 +1,10 @@
 +++
 title = "Equations with (r), (c), .."
-tags = ["equations"]
+description = """
+  Test to check that ®, © and ™ don't get interpreted
+  within equations.
+  """
+tags = ["equations", "mathjax"]
 categories = ["upstream"]
 draft = false
 +++

test/site/content/posts/indented-equations.md

@@ -1,6 +1,7 @@
 +++
 title = "Indented equations block"
-tags = ["equations", "indented"]
+description = "Testing equations with mathjax --- indented or not."
+tags = ["equations", "mathjax", "indented"]
 draft = false
 +++