Regular Expressions 101

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'
(\'|"")My-Text(\'|""):.*?
'
gm
1st Capturing Group
(\'|"")
1st Alternative
\'
\' matches the character ' with index 3910 (2716 or 478) literally (case sensitive)
2nd Alternative
""
""
matches the characters "" literally (case sensitive)
My-Text
matches the characters My-Text literally (case sensitive)
2nd Capturing Group
(\'|"")
1st Alternative
\'
\' matches the character ' with index 3910 (2716 or 478) literally (case sensitive)
2nd Alternative
""
""
matches the characters "" literally (case sensitive)
: matches the character : with index 5810 (3A16 or 728) literally (case sensitive)
.
matches any character (except for line terminators)
*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.

Regular Expression
No Match

r'
'
gm

Test String