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+## This apostrophe terminated the single quoted string!
+
+### Problematic code:
+
+```sh
+echo 'Nothing so needs reforming as other people's habits.'
+```
+
+### Correct code:
+
+```sh
+echo 'Nothing so needs reforming as other people'\''s habits.'
+```
+or
+```sh
+echo "Nothing so needs reforming as other people's habits."
+```
+### Rationale:
+
+When writing a string in single quotes, you have to make sure that any apostrophes in the text don't accidentally terminate the single quoted string prematurely.
+
+Escape them properly (see the correct code) or switch quotes to avoid the problem.
+
+### Exceptions:
+
+None.
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