Update README.md

Add example for appending an extension to files that do not have an extension
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Chris Davis 2019-10-31 11:20:50 -07:00 committed by GitHub
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@ -76,6 +76,7 @@ Matching and variable examples:
| (.\*).png | foo\_$1.png | Prepends "foo\_" to the existing file name |
| (.\*).png | $1\_foo.png | Appends "\_foo" to the existing file name |
| (.\*) | $1.txt | Appends ".txt" extension to existing file name |
| (^\w+\.$)\|(^\w+$) | $2.txt | Appends ".txt" extension to existing file name only if it does not have an extension |
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