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rails--rails/actionpack/lib/action_dispatch/middleware/templates
Tijmen Brommet 08689a2d1f Add text template for source code
When a request is made with AJAX and an error occurs, Rails will render
a text-template for the exception instead of the HTML error page
(#11960).

The `.text.erb` variant of the `_source` template is currently missing,
causing HTML to be rendered in the response. This commit adds the text
template.

To keep the page scannable we only only show the first three source
extracts.

Related to #14745.

Before:

```
~/testing-exceptions  ᐅ curl 'http://localhost:3000/' -H
'X-Requested-With: XMLHttpRequest'
RuntimeError in PostsController#index

    <div class="source " id="frame-source-0">
      <div class="info">
        Extracted source (around line <strong>#3</strong>):
      </div>
      <div class="data">
        <table cellpadding="0" cellspacing="0" class="lines">
          <tr>
```

After:

```
~/testing-exceptions  ᐅ curl 'http://localhost:3000/' -H
'X-Requested-With: XMLHttpRequest'
RuntimeError in PostsController#index

Extracted source (around line #3):

*3     raise
```
2015-11-03 22:13:10 +00:00
..
rescues Add text template for source code 2015-11-03 22:13:10 +00:00
routes Change filter on /rails/info/routes to use an actual path regexp from rails 2015-02-23 19:57:01 +03:00