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+## You need a space after the '{'.
+
+### Problematic code:
+
+```sh
+foo() {echo "hello world;}
+```
+
+### Correct code:
+
+```sh
+foo() { echo "hello world;}
+```
+### Rationale:
+
+`{` is only recognized as the start of a command group when it's a separate token.
+
+If it's not a separate token, like in the problematic example, it will be considered a literal character, as if writing `"{echo"` with quotes, and therefore usually cause a syntax error.
+
+### Exceptions:
+
+None.
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