Move pages under tldr, lint run.sh, update docs

tldr/xml

@@ -0,0 +1,34 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# xml
+
+> XMLStarlet Toolkit: query, edit, check, convert and transform XML documents.
+> Some subcommands such as `xml validate` have their own usage documentation.
+> More information: <http://xmlstar.sourceforge.net/docs.php>.
+
+- Display general help, including the list of subcommands:
+
+`xml --help`
+
+- Execute a subcommand with input from a file or URI, printing to `stdout`:
+
+`xml {{subcommand}} {{options}} {{path/to/input.xml|URI}}`
+
+- Execute a subcommand using `stdin` and `stdout`:
+
+`xml {{subcommand}} {{options}}`
+
+- Execute a subcommand with input from a file or URI and output to a file:
+
+`xml {{subcommand}} {{options}} {{path/to/input.xml|URI}} > {{path/to/output}}`
+
+- Display help for a specific subcommand:
+
+`xml {{subcommand}} --help`
+
+- Display version:
+
+`xml --version`