lineinfile with a backslash in the regexp field

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Hello,

I would like to replace the following line:
jstl.jar,taglibs-standard-spec-.jar**,*

with:
jstl.jar,taglibs-standard-spec-*.jar,icu4j-2.6.1.jar,\

I tried to double the backslash without any success, the issue occurs only on the regexp backslash:

For example, when doing this:

  • name: catalina.properties jstl
    lineinfile:
    dest: /{{ tomcatdir }}/conf/catalina.properties
    regexp: “^jstl.jar,taglibs-standard-spec-.jar__,.__”
    line: “jstl.jar,taglibs-standard-spec-*.jar,icu4j-2.6.1.jar,\”

I have no error but an extra line as it does not recognize the line to replace, I thought ‘.’ was meaning any character and ‘*’ as many as we want.
When using this one:

regexp: “^jstl.jar,taglibs-standard-spec-.jar**,\**"
line: "jstl.jar,taglibs-standard-spec-.jar,icu4j-2.6.1.jar,\”

I have a syntax error.

Can you help me about using the backslash in the regexp parameter, without being a special character ?

Regards