Prettier supoprt for paramDescription and paramName

Author: jamesmengo

packages/prettier-plugin-liquid/src/printer/print/liquid.ts

@@ -1,4 +1,10 @@
-import { NodeTypes, NamedTags, isBranchedTag, RawMarkup } from '@shopify/liquid-html-parser';
+import {
+  NodeTypes,
+  NamedTags,
+  isBranchedTag,
+  RawMarkup,
+  LiquidDocParamNode,
+} from '@shopify/liquid-html-parser';
 import { Doc, doc } from 'prettier';
 
 import {
@@ -497,7 +503,22 @@ export function printLiquidDoc(
   _args: LiquidPrinterArgs,
 ) {
   const body = path.map((p: any) => print(p), 'nodes');
-  return [indent([hardline, body]), hardline];
+  return [indent([hardline, join(hardline, body)]), hardline];
+}
+
+export function printLiquidDocParam(
+  path: AstPath<LiquidDocParamNode>,
+  _options: LiquidParserOptions,
+  _print: LiquidPrinter,
+  _args: LiquidPrinterArgs,
+): Doc {
+  const node = path.getValue();
+  return [
+    node.name,
+    ' ',
+    node.paramName.value,
+    node.paramDescription.value ? ' ' + node.paramDescription.value : '',
+  ];
 }
 
 function innerLeadingWhitespace(node: LiquidTag | LiquidBranch) {

packages/prettier-plugin-liquid/src/printer/printer-liquid-html.ts

@@ -46,6 +46,7 @@ import {
   printLiquidRawTag,
   printLiquidTag,
   printLiquidVariableOutput,
+  printLiquidDocParam,
 } from './print/liquid';
 import { printClosingTagSuffix, printOpeningTagPrefix } from './print/tag';
 import { bodyLines, hasLineBreakInRange, isEmpty, isTextLikeNode, reindent } from './utils';
@@ -555,7 +556,7 @@ function printNode(
     }
 
     case NodeTypes.LiquidDocParamNode: {
-      return [node.name, ' ', node.paramName, ' ', node.paramDescription];
+      return printLiquidDocParam(path as AstPath<LiquidDocParamNode>, options, print, args);
     }
 
     default: {

packages/prettier-plugin-liquid/src/test/liquid-doc/fixed.liquid

@@ -7,3 +7,8 @@ It should not dedent to root
 {% doc %}
   @param paramName param with description
 {% enddoc %}
+
+It should trim whitespace between nodes
+{% doc %}
+  @param paramName param with description
+{% enddoc %}

packages/prettier-plugin-liquid/src/test/liquid-doc/index.liquid

@@ -7,3 +7,8 @@ It should not dedent to root
 {% doc %}
 @param paramName param with description
 {% enddoc %}
+
+It should trim whitespace between nodes
+{% doc %}
+@param paramName       param with description
+{% enddoc %}