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* Add an example of trap command (#1826)Sachin Divekar2016-06-26-0/+82
* Begin writing document for PCRE Started writing learnxinyminutes document for PCRE to cover general purpose regular expressions. Added introduction and a couple of details. * Change introductory example for regex The old example was incorrect. It's replaced with a simple one. * Add some more introductory text * Add first example * Added more example and a table for proper formatting * Add few more examples * Formatting * Improve example * Edit description of character classes * Add a way to test regex Add https://regex101.com/ web application to test the regex provided in example. * Add example of trap command trap is a very important command to intercept a fatal signal, perform cleanup, and then exit gracefully. It needs an entry in this document. Here a simple and most common example of using trap command i.e. cleanup upon receiving signal is added. * Revert "Add example of trap command" * Add an example of trap command `trap` is a very important command to intercept a fatal signal, perform cleanup, and then exit gracefully. It needs an entry in this document. Here a simple and most common example of using `trap` command i.e. cleanup upon receiving signal is added.