Update CodeMirror dep to v5.42.2

Affects Code and Markdown section types

gui/public/codemirror/mode/css/css.js

@@ -1,5 +1,5 @@
 // CodeMirror, copyright (c) by Marijn Haverbeke and others
-// Distributed under an MIT license: http://codemirror.net/LICENSE
+// Distributed under an MIT license: https://codemirror.net/LICENSE
 
 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
@@ -63,7 +63,7 @@ CodeMirror.defineMode("css", function(config, parserConfig) {
       if (/[\d.]/.test(stream.peek())) {
         stream.eatWhile(/[\w.%]/);
         return ret("number", "unit");
-      } else if (stream.match(/^-[\w\\\-]+/)) {
+      } else if (stream.match(/^-[\w\\\-]*/)) {
         stream.eatWhile(/[\w\\\-]/);
         if (stream.match(/^\s*:/, false))
           return ret("variable-2", "variable-definition");
@@ -501,7 +501,7 @@ CodeMirror.defineMode("css", function(config, parserConfig) {
     "margin-bottom", "margin-left", "margin-right", "margin-top",
     "marks", "marquee-direction", "marquee-loop",
     "marquee-play-count", "marquee-speed", "marquee-style", "max-height",
-    "max-width", "min-height", "min-width", "move-to", "nav-down", "nav-index",
+    "max-width", "min-height", "min-width", "mix-blend-mode", "move-to", "nav-down", "nav-index",
     "nav-left", "nav-right", "nav-up", "object-fit", "object-position",
     "opacity", "order", "orphans", "outline",
     "outline-color", "outline-offset", "outline-style", "outline-width",

gui/public/codemirror/mode/css/gss.html

@@ -8,11 +8,12 @@
 <link rel="stylesheet" href="../../addon/hint/show-hint.css">
 <script src="../../lib/codemirror.js"></script>
 <script src="css.js"></script>
+<script src="../../addon/edit/matchbrackets.js"></script>
 <script src="../../addon/hint/show-hint.js"></script>
 <script src="../../addon/hint/css-hint.js"></script>
 <style>.CodeMirror {background: #f8f8f8;}</style>
 <div id=nav>
-  <a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
+  <a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
 
   <ul>
     <li><a href="../../index.html">Home</a>
@@ -90,7 +91,7 @@ body {
       var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
         extraKeys: {"Ctrl-Space": "autocomplete"},
         lineNumbers: true,
-        matchBrackets: "text/x-less",
+        matchBrackets: true,
         mode: "text/x-gss"
       });
     </script>

gui/public/codemirror/mode/css/gss_test.js

@@ -1,5 +1,5 @@
 // CodeMirror, copyright (c) by Marijn Haverbeke and others
-// Distributed under an MIT license: http://codemirror.net/LICENSE
+// Distributed under an MIT license: https://codemirror.net/LICENSE
 
 (function() {
   "use strict";

gui/public/codemirror/mode/css/index.html

@@ -12,7 +12,7 @@
 <script src="../../addon/hint/css-hint.js"></script>
 <style>.CodeMirror {background: #f8f8f8;}</style>
 <div id=nav>
-  <a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
+  <a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
 
   <ul>
     <li><a href="../../index.html">Home</a>

gui/public/codemirror/mode/css/less.html

@@ -10,7 +10,7 @@
 <script src="css.js"></script>
 <style>.CodeMirror {border: 1px solid #ddd; line-height: 1.2;}</style>
 <div id=nav>
-  <a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
+  <a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
 
   <ul>
     <li><a href="../../index.html">Home</a>
@@ -140,8 +140,8 @@ fieldset span button, fieldset span input[type="file"] {
 </textarea></form>
     <script>
       var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
-        lineNumbers : true,
-        matchBrackets : true,
+        lineNumbers: true,
+        matchBrackets: true,
         mode: "text/x-less"
       });
     </script>

gui/public/codemirror/mode/css/less_test.js

@@ -1,5 +1,5 @@
 // CodeMirror, copyright (c) by Marijn Haverbeke and others
-// Distributed under an MIT license: http://codemirror.net/LICENSE
+// Distributed under an MIT license: https://codemirror.net/LICENSE
 
 (function() {
   "use strict";

gui/public/codemirror/mode/css/scss.html

@@ -6,10 +6,11 @@
 
 <link rel="stylesheet" href="../../lib/codemirror.css">
 <script src="../../lib/codemirror.js"></script>
+<script src="../../addon/edit/matchbrackets.js"></script>
 <script src="css.js"></script>
 <style>.CodeMirror {background: #f8f8f8;}</style>
 <div id=nav>
-  <a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
+  <a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
 
   <ul>
     <li><a href="../../index.html">Home</a>

gui/public/codemirror/mode/css/scss_test.js

@@ -1,5 +1,5 @@
 // CodeMirror, copyright (c) by Marijn Haverbeke and others
-// Distributed under an MIT license: http://codemirror.net/LICENSE
+// Distributed under an MIT license: https://codemirror.net/LICENSE
 
 (function() {
   var mode = CodeMirror.getMode({indentUnit: 2}, "text/x-scss");

gui/public/codemirror/mode/css/test.js

@@ -1,5 +1,5 @@
 // CodeMirror, copyright (c) by Marijn Haverbeke and others
-// Distributed under an MIT license: http://codemirror.net/LICENSE
+// Distributed under an MIT license: https://codemirror.net/LICENSE
 
 (function() {
   var mode = CodeMirror.getMode({indentUnit: 2}, "css");
@@ -149,6 +149,14 @@
      "  [property color]: [atom var]([variable-2 --main-color]);",
      "}");
 
+  MT("blank_css_variable",
+     ":[variable-3 root] {",
+     "  [variable-2 --]: [atom #06c];",
+     "}",
+     "[tag h1][builtin #foo] {",
+     "  [property color]: [atom var]([variable-2 --]);",
+     "}");
+
   MT("supports",
      "[def @supports] ([keyword not] (([property text-align-last]: [atom justify]) [keyword or] ([meta -moz-][property text-align-last]: [atom justify])) {",
      "  [property text-align-last]: [atom justify];",