From 1d299b232b4eaf1709c80b3c337972c21e3ee8b0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20Ke=C3=9Fler=20=28via=20gitlab=20runner=29?=
 <git@maximilian-kessler.de>
Date: Mon, 27 Jun 2022 14:01:58 +0000
Subject: [PATCH] add fix for equal arrows in tikz-cd

Build branch master (b7ba678) from kesslermaximilian/LatexPackages
---
 build_info.json                   | 12 ++++++------
 math/mathfig/mkessler-mathfig.sty | 30 ++++++++++++++++++++++++++++--
 2 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/build_info.json b/build_info.json
index 19dc50d..10ddd9e 100644
--- a/build_info.json
+++ b/build_info.json
@@ -1,8 +1,8 @@
 {
     "build_time": "",
     "source files": {
-        "version": "v2.9-14-gc939483",
-        "commit": "c939483b4283dd03bf86429cc23b66b6084ea090",
+        "version": "v2.9-15-gb7ba678",
+        "commit": "b7ba678943aae7a865556f4295a4509fb3f9bd7f",
         "dirty": false
     },
     "pytex": {
@@ -80,12 +80,12 @@
         {
             "name": "math/mathfig/mkessler-mathfig.sty",
             "source file": "math/mathfig/mathfig.pysty",
-            "build time": "2022/01/30 23:48",
-            "source version": "v2.8.1-9-g4bda829",
-            "source commit hash": "4bda829518c07d985656547cf897712db361160e",
+            "build time": "2022/06/27 14:01",
+            "source version": "v2.9-15-gb7ba678",
+            "source commit hash": "b7ba678943aae7a865556f4295a4509fb3f9bd7f",
             "pytex version": "v1.2.0-31-gc9bb0e8",
             "pytex commit hash": "c9bb0e87c91beae3e17a829603e4459cf804ec51",
-            "md5sum": "54a8900c6123889fa1823424c074a9ea",
+            "md5sum": "ff0be1fc2a4563885533c7be16a7dab1",
             "dirty": false
         },
         {
diff --git a/math/mathfig/mkessler-mathfig.sty b/math/mathfig/mkessler-mathfig.sty
index b2d7196..a6a735a 100644
--- a/math/mathfig/mkessler-mathfig.sty
+++ b/math/mathfig/mkessler-mathfig.sty
@@ -31,7 +31,7 @@
 % 
 % Build details:
 %   PyTeX version: v1.2.0-31-gc9bb0e8 (commit c9bb0e8)
-%   Source code version: v2.8.1-9-g4bda829 (commit 4bda829)
+%   Source code version: v2.9-15-gb7ba678 (commit b7ba678)
 % 
 % This LaTeX package is free software and is dual-licensed
 % under the LPPLv1.3c and the GPLv3 licenses.
@@ -47,7 +47,7 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-mathfig}[2022/01/30 - Math figures with TikZ / pgfplots / xy]
+\ProvidesPackage{mkessler-mathfig}[2022/06/27 - Math figures with TikZ / pgfplots / xy]
 
 
 % This is just a collection of the packages I use to typeset mathematical figures
@@ -93,3 +93,29 @@
 \NewDocumentCommand\pullback{ O{dr} }{
     \arrow[phantom, pos=0.45]{#1}{\pullbacksymbol}
 }
+
+
+%% Fix for equal arrows in tikz, see
+% https://tex.stackexchange.com/questions/443017/equal-arrows-without-transparent-ends-possible-in-tikzcd
+
+\usetikzlibrary{decorations.markings}
+\tikzset {
+  double line with arrow/.style args=
+    { #1, #2 }
+    { decorate, decoration =
+      {
+        markings,
+        mark = at position 0 with
+          {
+            \coordinate (ta-base-1) at (0,1pt);
+            \coordinate (ta-base-2) at (0,-1pt);
+          },
+        mark = at position 1 with
+          {
+            \draw[#1] (ta-base-1) -- (0,1pt);
+            \draw[#2] (ta-base-2) -- (0,-1pt);
+          }
+       }
+     }
+}
+\tikzset{Equal/.style={-,double line with arrow={-,-}}}