Update cheatsheets

alex

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# alex
+
+> Catch insensitive, inconsiderate writing.
+> It helps you find gender favouring, polarising, race related, religion inconsiderate, or other unequal phrasing in text.
+> More information: <https://github.com/get-alex/alex>.
+
+- Analyze text from `stdin`:
+
+`echo {{His network looks good}} | alex --stdin`
+
+- Analyze all files in the current directory:
+
+`alex`
+
+- Analyze a specific file:
+
+`alex {{path/to/file.md}}`
+
+- Analyze all Markdown files except `example.md`:
+
+`alex *.md !{{example.md}}`