How to check a variable for presence of one of several characters?

How can I check whether a variable contains one of several characters, e.g. several types closing quote marks? (Like ’, ”, " etc.)

You can do it using regular expressions. Put the quote characters in between an open square bracket and a close square bracket, like this:


NOTE: If you try this with other characters, there are some characters that have to be "escaped" by preceding them with a backslash \ when you put them inside the brackets. When in doubt, experiment at

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