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

tldr/expand

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# expand
+
+> Convert tabs to spaces.
+> More information: <https://www.gnu.org/software/coreutils/expand>.
+
+- Convert tabs in each file to spaces, writing to `stdout`:
+
+`expand {{path/to/file}}`
+
+- Convert tabs to spaces, reading from `stdin`:
+
+`expand`
+
+- Do not convert tabs after non blanks:
+
+`expand -i {{path/to/file}}`
+
+- Have tabs a certain number of characters apart, not 8:
+
+`expand -t={{number}} {{path/to/file}}`
+
+- Use a comma separated list of explicit tab positions:
+
+`expand -t={{1,4,6}}`