Fix extended regular expressions
Fix extended regular expressions

By default, grep already uses regular expressions when searching.

The example `grep -e {{^regex$}} {{path/to/file}}` is the same as `grep {{^regex$}} {{path/to/file}}`.

However, because of the comment about extended regular expressions, I mistakenly assumed `-e` was the option to enable it.

I believe most people would refer to `tldr` in this use case looking for the `-E` extended regular expressions.

With this in mind, I believe that example would be better rephrased as this pull request makes it.
UncommonPleb/tldr,katekyan/tldr,cptdeka10/tldr,AgamAgarwal/tldr,zoisom/tldr,Phizho/tldr,katekyan/tldr,slash3b/tldr,deekim/tldr,felixonmars/tldr,zoisom/tldr,cptdeka10/tldr,UncommonPleb/tldr,slash3b/tldr,deekim/tldr,Phizho/tldr,felixonmars/tldr,felixonmars/tldr,zoisom/tldr,katekyan/tldr,UncommonPleb/tldr,Phizho/tldr,deekim/tldr,slash3b/tldr,AgamAgarwal/tldr,cptdeka10/tldr