And, for completeness: 
xms
^^^
|||
|| Make . also match \n (not needed here).
||
| Make ^ and $ match beginning and end of lines (not needed here).
|
 Allow whitespace in the pattern for readability.

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re^4: regex to rename last _ with , by choroba
in thread regex to rename last _ with , by Anonymous Monk

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