Fix InlineHtmlParser::parseBladeDirective for autocompletion

[N1ebieski]

There is a bug with InlineHtmlParser::parseBladeDirective, probably related with https://github.com/Stillat/blade-parser

Currently, autocompletion for directives doesn't work at all, because the command:

php-parser autocomplete "@can('" --debug

returns:

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                              STARTING TO PARSE
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Microsoft\PhpParser\Node\SourceFileNode @can('
+ Context: App\Contexts\Base
* Parsing: App\Parsers\SourceFileNodeParser

 Microsoft\PhpParser\Node\Statement\InlineHtml @can('
 + Context: App\Contexts\Base
 * Parsing: App\Parsers\InlineHtmlParser
[]

I debugged this issue and figured out

DirectiveNode::content returns can without arguments, should be: can('

This PR fixes this issue:

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                              STARTING TO PARSE
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Microsoft\PhpParser\Node\SourceFileNode @can('
+ Context: App\Contexts\Base
* Parsing: App\Parsers\SourceFileNodeParser

 Microsoft\PhpParser\Node\Statement\InlineHtml @can('
 + Context: App\Contexts\Base
 * Parsing: App\Parsers\InlineHtmlParser


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                              STARTING TO PARSE
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Microsoft\PhpParser\Node\SourceFileNode <?php directivecan(';
+ Context: App\Contexts\Base
* Parsing: App\Parsers\SourceFileNodeParser

 Microsoft\PhpParser\Node\Statement\InlineHtml <?php 
 + Context: App\Contexts\Base
 * Parsing: App\Parsers\InlineHtmlParser

 Microsoft\PhpParser\Node\Statement\ExpressionStatement directivecan(
 + Context: App\Contexts\Base
 * Parsing: App\Parsers\ExpressionStatementParser

  Microsoft\PhpParser\Node\Expression\CallExpression directivecan(
  + Context: App\Contexts\MethodCall
  * Parsing: App\Parsers\CallExpressionParser

   Microsoft\PhpParser\Node\QualifiedName directivecan
{
    "type": "methodCall",
    "autocompleting": true,
    "methodName": "@can",
    "className": null,
    "arguments": {
        "type": "arguments",
        "autocompletingIndex": 0,
        "children": []
    },
    "parent": {
        "type": "base",
        "parent": null
    }
}