Update cheatsheets

tldr/linux/col

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# col
+
+> Filter reverse line feeds from input.
+> More information: <https://manned.org/col>.
+
+- Filter reverse line feeds from input:
+
+`{{command}} | col`
+
+- Filter reverse line feeds and output with spaces instead of tabs:
+
+`{{command}} | col {{[-x|--spaces]}}`
+
+- Remove backspaces, output only the last character written to each position:
+
+`{{command}} | col {{[-b|--no-backspaces]}}`
+
+- Specify a buffer size with a specific number of lines:
+
+`{{command}} | col {{[-l|--lines]}} {{num}}`
+
+- Format a manual page for viewing with `less`:
+
+`man ls | col {{[-b|--no-backspaces]}} | less`
+
+- Process a file with reverse line feeds and save the cleaned output:
+
+`cat {{path/to/input_file}} | col {{[-x|--spaces]}} > {{output_file}}`