Solidity industry indents using 4 spaces and this opinionated code formatter should follow the industry. (#122)

Author: Janther

src/index.js

@@ -55,8 +55,15 @@ const printers = {
   }
 };
 
+// https://prettier.io/docs/en/plugins.html#defaultoptions
+const defaultOptions = {
+  // @TODO fix indentation in block comments
+  tabWidth: 4
+};
+
 module.exports = {
   languages,
   parsers,
-  printers
+  printers,
+  defaultOptions
 };

tests/AddressPayable/__snapshots__/jsfmt.spec.js.snap

@@ -14,14 +14,14 @@ contract AddressPayable {
 pragma solidity ^0.5.2;
 
 contract AddressPayable {
-  address payable[] hello;
-  function sendSomeEth(address payable to, address payable[] memory world)
-    public
-    payable
-  {
-    address payable target = to;
-    target.transfer(msg.value);
-  }
+    address payable[] hello;
+    function sendSomeEth(address payable to, address payable[] memory world)
+        public
+        payable
+    {
+        address payable target = to;
+        target.transfer(msg.value);
+    }
 }
 
 `;