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Added shebangs to examples
@@ -3,12 +3,14 @@
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### Problematic code:
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### Problematic code:
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```sh
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```sh
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#!/bin/sh
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[ "$var" =~ .*foo[0-9]* ]
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[ "$var" =~ .*foo[0-9]* ]
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```
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```
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### Correct code:
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### Correct code:
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```sh
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```sh
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#!/bin/sh
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expr "$var" : ".*foo[0-9]*" > /dev/null
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expr "$var" : ".*foo[0-9]*" > /dev/null
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```
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```
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