add block code

src/blocks/code/code.html

 <!--DEV
 
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-  <code class="code__syntax  css">
-    <span class="code__line">/* Родитель: */</span>
-  </code>
+  <code>/* Родитель: */</code>
 </pre>
 
 -->

src/blocks/code/code.js

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-}
-
-.hljs-symbol,
-.hljs-bullet {
-  color: #990073;
-}
-
-.hljs-built_in,
-.hljs-builtin-name {
-  color: #0086b3;
-}
-
-.hljs-meta {
-  color: #999;
-  font-weight: 700;
-}
-
-.hljs-deletion {
-  background: #fdd;
-}
-
-.hljs-addition {
-  background: #dfd;
-}
-
-.hljs-emphasis {
-  font-style: italic;
-}
-
-.hljs-strong {
-  font-weight: 700;
-}
-
-.less {
-
-  .hljs-selector-tag {
-    font-weight: 400;
-  }
-
-  .hljs-variable {
-    color: #f60;
-  }
-}

src/blocks/code/code.scss

+// В этом файле должны быть стили только для БЭМ-блока code, его элементов,
+// модификаторов, псевдоселекторов, псевдоэлементов, @media-условий...
+// Не пишите здесь другие селекторы.
+
+.code {
+  display: block;
+  width: 100%;
+  overflow-x: auto;
+  background-color: $gray-lightest;
+  padding: 1em;
+  border-radius: $border-radius;
+  border: 1px solid $gray-lighter;
+  white-space: normal;
+  tab-size: 2;
+  max-height: 50rem;
+
+  code {
+    display: block;
+    white-space: pre;
+  }
+}

src/blocks/code/readme.md

-См. [highlightjs.org/download/](https://highlightjs.org/download/)