From 30b145cc4660ae5d86bd0de88e373d3107ba54d5 Mon Sep 17 00:00:00 2001
From: Scott Worley <scottworley@scottworley.com>
Date: Fri, 26 Jan 2024 00:37:41 -0800
Subject: [PATCH] =?utf8?q?Handle=20Unicode=20characters=20=E2=89=88=20and?=
 =?utf8?q?=20=E2=97=81?=
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
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This is a temporary expediency.  These characters sometimes appear in a
math expression and sometimes outside of a math expression, so when we
start correctly rendering math expressions, we can't just blindly jump
into math mode like this.  :(
---
 paperdoorknob.py | 1 +
 texfilter.py     | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/paperdoorknob.py b/paperdoorknob.py
index ed7813b..5ad341f 100644
--- a/paperdoorknob.py
+++ b/paperdoorknob.py
@@ -11,6 +11,7 @@ from spec import Spec
 
 def process(spec: Spec) -> None:
     spec.texout.write(br'''\documentclass{article}
+\usepackage{amssymb}
 \usepackage{booktabs}
 \usepackage{graphicx}
 \usepackage{longtable}
diff --git a/texfilter.py b/texfilter.py
index de3674b..e215b18 100644
--- a/texfilter.py
+++ b/texfilter.py
@@ -13,6 +13,8 @@ TexFilters: List[Tuple[str, Callable[[bytes], bytes]]] = [
     # Work around `Extra }, or forgotten \endgroup.`
     ("FixBareNesting", lambda x: re.sub(
         b'(^|\n)(\\\\(emph|st){)', b'\\1\\\\hspace{0pt}\\2', x)),
+    ("UnicodeApprox", lambda x: re.sub('≈'.encode('utf-8'), b'$\\approx$', x)),
+    ("UnicodeTriangle", lambda x: re.sub('◁'.encode('utf-8'), b'$\\lhd$', x)),
 ]
 
 
-- 
2.44.1