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

tldr/lpr

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# lpr
+
+> CUPS tool for printing files.
+> See also: `lpstat` and `lpadmin`.
+> More information: <https://openprinting.github.io/cups/doc/man-lpr.html>.
+
+- Print a file to the default printer:
+
+`lpr {{path/to/file}}`
+
+- Print 2 copies:
+
+`lpr -# {{2}} {{path/to/file}}`
+
+- Print to a named printer:
+
+`lpr -P {{printer}} {{path/to/file}}`
+
+- Print either a single page (e.g. 2) or a range of pages (e.g. 2–16):
+
+`lpr -o page-ranges={{2|2-16}} {{path/to/file}}`
+
+- Print double-sided either in portrait (long) or in landscape (short):
+
+`lpr -o sides={{two-sided-long-edge|two-sided-short-edge}} {{path/to/file}}`
+
+- Set page size (more options may be available depending on setup):
+
+`lpr -o media={{a4|letter|legal}} {{path/to/file}}`
+
+- Print multiple pages per sheet:
+
+`lpr -o number-up={{2|4|6|9|16}} {{path/to/file}}`