Created SC1118 (markdown)

SC1118.md

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+## Delete whitespace after the here-doc end token.
+
+### Problematic code:
+
+"▭" below indicates an otherwise invisible space:
+
+```sh
+cat << "eof"
+Hello
+eof▭   
+```
+
+### Correct code:
+
+```sh
+cat << "eof"
+Hello
+eof
+```
+### Rationale:
+
+The end token of your here document has trailing whitespace. This is invisible to the naked eye, but shells do not accept it.
+
+Remove the trailing whitespace.
+
+### Exceptions:
+
+None.