Created SC2272 (markdown)

SC2272.md

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+## Command name contains ==. For comparison, use [ "$var" = value ].
+
+### Problematic code:
+
+```sh
+$a/$b==foo/bar
+```
+
+### Correct code:
+
+```sh
+[ "$a/$b" = "foo/bar" ] 
+```
+### Rationale:
+
+ShellCheck found a command name that contains a `==`. Most likely, this was intended as a kind of comparison.
+
+To compare two values, use `[ value1 = value2 ]`. Both the brackets and the spaces around the `=` are relevant. 
+
+### Exceptions:
+
+None, though you can quote the `==` to suppress the warning.
+
+### Related resources:
+
+* Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!