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Update cheatsheets
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@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
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# expr
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> Evaluate expressions and manipulate strings.
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> More information: <https://www.gnu.org/software/coreutils/expr>.
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> More information: <https://www.gnu.org/software/coreutils/manual/html_node/expr-invocation.html>.
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- Get the length of a specific string:
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