Add block documentation

docs/_data/variables/helpers/spacing.json

@@ -0,0 +1,37 @@
+{
+  "by_name": {
+    "$spacing-shortcuts": {
+      "name": "$spacing-shortcuts",
+      "value": "(\"margin\": \"m\", \"padding\": \"p\")",
+      "type": "string"
+    },
+    "$spacing-directions": {
+      "name": "$spacing-directions",
+      "value": "(\"top\": \"t\", \"right\": \"r\", \"bottom\": \"b\", \"left\": \"l\")",
+      "type": "string"
+    },
+    "$spacing-horizontal": {
+      "name": "$spacing-horizontal",
+      "value": "\"x\"",
+      "type": "string"
+    },
+    "$spacing-vertical": {
+      "name": "$spacing-vertical",
+      "value": "\"y\"",
+      "type": "string"
+    },
+    "$spacing-values": {
+      "name": "$spacing-values",
+      "value": "(\"0\": 0, \"1\": 0.25rem, \"2\": 0.5rem, \"3\": 0.75rem, \"4\": 1rem, \"5\": 1.5rem, \"6\": 3rem)",
+      "type": "string"
+    }
+  },
+  "list": [
+    "$spacing-shortcuts",
+    "$spacing-directions",
+    "$spacing-horizontal",
+    "$spacing-vertical",
+    "$spacing-values"
+  ],
+  "file_path": "helpers/spacing.sass"
+}