bug #26980 [TwigBundle] fix formatting arguments in plaintext format (xabbuh)

This PR was merged into the 3.4 branch.

Discussion
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[TwigBundle] fix formatting arguments in plaintext format

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Commits
-------

f1c1d36fda fix formatting arguments in plaintext format

src/Symfony/Bundle/TwigBundle/Resources/views/Exception/trace.txt.twig

@@ -1,5 +1,5 @@
 {% if trace.function %}
-at {{ trace.class ~ trace.type ~ trace.function }}({{ trace.args|format_args }})
+at {{ trace.class ~ trace.type ~ trace.function }}({{ trace.args|format_args_as_text }})
 {%- endif -%}
 {% if trace.file|default('') is not empty and trace.line|default('') is not empty %}
   {{- trace.function ? '\n     (' : 'at '}}{{ trace.file|format_file(trace.line)|striptags|replace({ (' at line ' ~ trace.line): '' }) }}:{{ trace.line }}{{ trace.function ? ')' }}