Update cheatsheets

wal

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# wal
+
+> Create color schemes based on the dominant colors of a wallpaper.
+> More information: <https://github.com/dylanaraps/pywal>.
+
+- Preview color scheme:
+
+`wal --preview {{image.png}}`
+
+- Create color scheme:
+
+`wal -i {{image.png}}`
+
+- Create a light color scheme:
+
+`wal -i {{image.png}} -l`
+
+- Skip setting the desktop wallpaper:
+
+`wal -i {{image.png}} -n`
+
+- Skip setting the terminal colors:
+
+`wal -i {{image.png}} -s`
+
+- Restore the previously generated color scheme and wallpaper:
+
+`wal -R`