Add markdown linting configuration

Author: insspb

.editorconfig

@@ -0,0 +1,30 @@
+# http://editorconfig.org
+# https://editorconfig-specification.readthedocs.io/en/latest/
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{py,ini,sh}]
+indent_style = space
+indent_size = 4
+
+[*.{html,css,scss,json,yml,tpl,js,jsx}]
+indent_style = space
+indent_size = 2
+
+[*.md]
+indent_style = space
+indent_size = 4
+tab_width = 4
+
+[*.rst]
+indent_style = space
+indent_size = 3
+
+[Makefile]
+indent_style = tab

.markdownlint.json

@@ -0,0 +1,18 @@
+{
+  "MD003": true,
+  "MD004": false,
+  "MD007": false,
+  "MD013": {
+    "tables": false,
+    "code_blocks": false,
+    "line_length": 88
+  },
+  "MD024": false,
+  "MD026": false,
+  "MD029": false,
+  "MD034": true,
+  "MD046": true,
+  "code-block-style": {
+    "style": "fenced"
+  }
+}

.pre-commit-config.yaml

@@ -17,3 +17,9 @@ repos:
     hooks:
       - id: flake8
         exclude: ^docs/|^examples/
+  - repo: https://github.com/igorshubovych/markdownlint-cli
+    rev: v0.31.1
+    hooks:
+      - id: markdownlint
+        args: [-f]
+        exclude: ^(.github|tests)