Make small adjustments to backend math post.

content/blog/backend_math_rendering.md

@@ -89,7 +89,7 @@ to `node2nix`:
 ]
 ```
 
-The Ruby script I wrote for this (more on that soon) required the `nokigiri` gem, which
+The Ruby script I wrote for this (more on that soon) required the `nokogiri` gem, which
 I used for traversing the HTML generated for my site. Hugo was obviously required to
 generate the HTML.
 
@@ -109,7 +109,7 @@ some Bash scripts. The math on this page was rendered at the time it was generat
 
 This is a great point, and KaTeX is indeed usable for server-side rendering. But I've
 seen few people who do actually use it. Unfortunately, as I pointed out in my previous post on the subject,
-few tools that actually take your HTML page and replace LaTeX with rendered math.
+few tools actually take your HTML page and replace LaTeX with rendered math.
 Here's what I wrote about this last time:
 
 > [In MathJax,] The bigger issue, though, was that the `page2html`
@@ -183,7 +183,7 @@ some captions, alt texts, and similar elements should also be left alone.
 However, I don't have those on my website (yet), and I won't worry about
 them now. Either way, because of the code tags,
 we can't just search-and-replace over the entire page; we need to be context
-aware. This is where `nokigiri` comes in. We parse the HTML, and iterate
+aware. This is where `nokogiri` comes in. We parse the HTML, and iterate
 over all of the 'text' nodes, calling `perform_katex_sub` on all
 of those that _aren't_ inside code tags.
 
@@ -222,7 +222,7 @@ All in all:
 //*[not(self::code)]/text()
 ```
 
-Finally, we use this XPath from `nokigiri`:
+Finally, we use this XPath from `nokogiri`:
 
 ```Ruby {linenos=table}
 files = ARGV[0..-1]
@@ -278,7 +278,7 @@ take a few dozen seconds to run on my relatively small site. The
 better approach would be to use a NodeJS script, rather than a Ruby one,
 to perform the conversion. KaTeX also provides an API, so such a NodeJS
 script can find the files, parse the HTML, and perform the substitutions.
-I did quite like using `nokigiri` here, though, and I hope that an equivalently
+I did quite like using `nokogiri` here, though, and I hope that an equivalently
 pleasant solution exists in JavaScript.
 
 Re-rendering the whole website is also pretty wasteful. I rarely change the
@@ -287,6 +287,15 @@ to re-run the script, and therefore re-render every page. This makes sense
 for me, since I use Nix, and my builds are pretty much always performed
 from scratch. On the other hand, for others, this may not be the best solution.
 
+### Alternatives
+The same person who sent me the original email above also pointed out
+[this `pandoc` filter for KaTeX](https://github.com/Zaharid/pandoc_static_katex).
+I do not use Pandoc, but from what I can see, this fitler relies on
+Pandoc's `Math` AST nodes, and applies KaTeX to each of those. This
+should work, but wasn't applicable in my case, since Hugo's shrotcodes
+don't mix well with Pandoc. However, it certainly seems like a workable
+solution.
+
 ### Conclusion
 With the removal of MathJax from my site, it is now completely JavaScript free,
 and contains virtually the same HTML that it did beforehand. This, I hope,