Update cheatsheets

meld

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# meld
+
+> Graphical diffing and merging tool.
+> More information: <https://meldmerge.org/>.
+
+- Start `meld`:
+
+`meld`
+
+- Compare 2 files:
+
+`meld {{path/to/file_1}} {{path/to/file_2}}`
+
+- Compare 2 directories:
+
+`meld {{path/to/directory_1}} {{path/to/directory_2}}`
+
+- Compare 3 files:
+
+`meld {{path/to/file_1}} {{path/to/file_2}} {{path/to/file_3}}`
+
+- Open a comparison as a new tab in a pre-existing meld instance:
+
+`meld --newtab {{path/to/file_1}} {{path/to/file_2}}`
+
+- Compare multiple sets of files:
+
+`meld --diff {{path/to/file_1}} {{path/to/file_2}} --diff {{path/to/file_3}} {{path/to/file_4}}`