Created SC1117 (markdown)

SC1117.md

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+## Backslash is literal in `"\n"`. Prefer explicit escaping: `"\\n"`.
+
+### Problematic code:
+
+```sh
+printf "%s\n" "Hello"
+```
+
+### Correct code:
+
+```sh
+printf "%s\\n" "Hello"
+```
+
+or alternatively, with single quotes:
+
+```sh
+printf '%s\n' "Hello"
+```
+
+### Rationale:
+
+In a double quoted string, you have escaped a character that has no special behavior when escaped. Instead, it's invoking the fallback behavior of being interpreted literally.
+
+Instead of relying on this implicit fallback, you should escape the backslash explicitly. This makes it clear that it's meant to be passed as a literal backslash in the string parameter.
+
+### Exceptions:
+
+None. This is a stylistic issue which can be [[ignore]]d.
+
+Before you do -- can you name the 4 characters that *are* special when escaped in double quotes?