How to match a single quote in sed

You can either use:

"texta'textb" (APOSTROPHE inside QUOTATION MARKs)

or

'texta'\''textb' (APOSTROPHE text APOSTROPHE, then REVERSE SOLIDUS, APOSTROPHE, then APOSTROPHE more text APOSTROPHE)

I used unicode character names. REVERSE SOLIDUS is more commonly known as backslash.

In the latter case, you close your apostrophe, then shell-quote your apostrophe with a backslash, then open another apostrophe for the rest of the text.

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