Multiline regex

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unwanted_line1=blabla
unwanted_line2=blabla
...
important_content_section2
important_content_section3
unwanted_line3=blabla

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unwanted_line1=blabla
unwanted_line2=blabla
...
important_content_section2
important_content_section3
[stepxyz#xxxx]

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my ($getVariable) = $data =~ /(my_variable=.*\n(.+[^=]\n?)*)/;

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unwanted_line1=blabla
unwanted_line2=blabla
my_variable=important_content_section1
important_content_section2
important_content_section3
unwanted_line3=

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my_variable=important_content_section1
important_content_section2
important_content_section3

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