Add note about mathjax tag (#1984)

Signed-off-by: Chris Warrick <kwpolska@gmail.com>
getnikola · Aug 31, 2015 · d50bf52 · d50bf52
1 parent 0b24500
commit d50bf52
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diff --git a/docs/manual.txt b/docs/manual.txt
@@ -1395,6 +1395,8 @@ Nikola supports math input via MathJax.  It is activated via the math roles and
 directives of reStructuredText and the usual LaTeX delimiters (``\(inline\)``
 and ``\[display\]``) for other input formats.
 
+To use mathematics in a post, you must add the ``mathjax`` tag.
+
 We **DO NOT** support the old, deprecated and error-prone ``$inline$``
 delimiters by default. If you want to use them, please add them manually,
 like this: