Update cheatsheets

ifs

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# IFS
+
+> IFS (Internal Field Separator) is a special environment variable that defines the delimiter used for word splitting in Unix shells.
+> The default value of IFS is a space, tab, and newline. The three characters serve as delimiters.
+> More information: <https://www.gnu.org/software/bash/manual/html_node/Word-Splitting.html>.
+
+- View the current IFS value:
+
+`echo "$IFS"`
+
+- Change the IFS value:
+
+`IFS="{{:}}"`
+
+- Reset IFS to default:
+
+`IFS=$' 	
+'`
+
+- Temporarily change the IFS value in a subshell:
+
+`(IFS="{{:}}"; echo "{{one:two:three}}")`