[ExpressionLanguage] Fixed an issue with # characters in double quoted string literals
bug #11439 [ExpressionLanguage] Fixed double quoted string literals containing sharps (pylebecq)

This PR was merged into the 2.4 branch.

Discussion
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[ExpressionLanguage] Fixed double quoted string literals containing sharps

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11433
| License       | MIT
| Doc PR        | n/a

Commits
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0c2622e [ExpressionLanguage] Fixed an issue with # characters in double quoted string literals