[BUGFIX] inline break needs to convert to space

An inline break needs to be converted to a space as markdown
doesn't care about linebreaks in a paragraph.

Author: jaapio

packages/guides-markdown/resources/config/guides-markdown.php

@@ -11,6 +11,7 @@
 use phpDocumentor\Guides\Markdown\Parsers\InlineParsers\InlineCodeParser;
 use phpDocumentor\Guides\Markdown\Parsers\InlineParsers\InlineImageParser;
 use phpDocumentor\Guides\Markdown\Parsers\InlineParsers\LinkParser;
+use phpDocumentor\Guides\Markdown\Parsers\InlineParsers\NewLineParser;
 use phpDocumentor\Guides\Markdown\Parsers\InlineParsers\PlainTextParser;
 use phpDocumentor\Guides\Markdown\Parsers\InlineParsers\StrongParser;
 use phpDocumentor\Guides\Markdown\Parsers\ListBlockParser;
@@ -73,6 +74,8 @@
         ->set(InlineImageParser::class)
         ->arg('$inlineParsers', tagged_iterator('phpdoc.guides.markdown.parser.inlineParser'))
         ->tag('phpdoc.guides.markdown.parser.inlineParser')
+        ->set(NewLineParser::class)
+        ->tag('phpdoc.guides.markdown.parser.inlineParser')
 
         ->set(MarkupLanguageParser::class)
         ->arg('$parsers', tagged_iterator('phpdoc.guides.markdown.parser.blockParser'))

packages/guides-markdown/src/Markdown/Parsers/InlineParsers/NewLineParser.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of phpDocumentor.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @link https://phpdoc.org
+ */
+
+namespace phpDocumentor\Guides\Markdown\Parsers\InlineParsers;
+
+use League\CommonMark\Node\Inline\Newline;
+use League\CommonMark\Node\Node as CommonMarkNode;
+use League\CommonMark\Node\NodeWalker;
+use League\CommonMark\Node\NodeWalkerEvent;
+use phpDocumentor\Guides\MarkupLanguageParser;
+use phpDocumentor\Guides\Nodes\Inline\InlineNode;
+use phpDocumentor\Guides\Nodes\Inline\PlainTextInlineNode;
+
+/** @extends AbstractInlineParser<PlainTextInlineNode> */
+class NewLineParser extends AbstractInlineParser
+{
+    public function __construct()
+    {
+    }
+
+    public function parse(MarkupLanguageParser $parser, NodeWalker $walker, CommonMarkNode $current): InlineNode
+    {
+        return new PlainTextInlineNode(' ');
+    }
+
+    public function supports(NodeWalkerEvent $event): bool
+    {
+        return $event->isEntering() && $event->getNode() instanceof Newline;
+    }
+}