[FrameworkBundle] Remove invalid markup
bug #11897 [FrameworkBundle] Remove invalid markup (flack)

This PR was submitted for the 2.5 branch but it was merged into the 2.3 branch instead (closes #11897).

Discussion
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[FrameworkBundle] Remove invalid markup

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11896
| License       | MIT
| Doc PR        | n/a

Commits
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1fe8e31 [FrameworkBundle] Remove invalid markup