Update cheatsheets

linux/fold

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# fold
+
+> Folds long lines for fixed-width output devices.
+> More information: <https://www.gnu.org/software/coreutils/fold>.
+
+- Fold lines in a fixed width:
+
+`fold --width {{width}} {{path/to/file}}`
+
+- Count width in bytes (the default is to count in columns):
+
+`fold --bytes --width {{width_in_bytes}} {{path/to/file}}`
+
+- Break the line after the rightmost blank within the width limit:
+
+`fold --spaces --width {{width}} {{path/to/file}}`