Used the wiki template and added examples from #1979

SC1125.md

@@ -1 +1,20 @@
-See [the Directive page](Directive) about how to properly [format a shellcheck directive](Directive#documenting-directive-use).
+## Invalid key=value pair in directive
+
+### Problematic code:
+
+```sh
+# shellcheck disable=SC2153 (variable not a misspelling)
+```
+
+### Correct code:
+
+```sh
+# shellcheck disable=SC2153 # variable not a misspelling
+```
+
+### Rationale:
+
+A comment at the end of a directive must be preceded by a `#`
+to avoid it being interpreted as an instruction.
+The [directive page](Directive#documenting-directive-use)
+contains more guidance about commenting style.