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David Yu david-yu

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### Keybase proof
I hereby claim:
* I am yongshin on github.
* I am yongshin (https://keybase.io/yongshin) on keybase.
* I have a public key whose fingerprint is 866A 2DDB D13E 5CC1 156A A12E 37EA 4CE1 E27A D81D
To claim this, I am signing this object:
#!/bin/bash
###
### my-script — does one thing well
###
### Usage:
### my-script <input> <output>
###
### Options:
### <input> Input file to read.
### <output> Output file to write. Use '-' for stdout.