FAQ: add question about * and ! endings on forms.

diff --git a/docs/FAQ.md b/docs/FAQ.md
index 3be1bc0..f292b1b 100644 (file)
--- a/docs/FAQ.md
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@@ -172,3 +172,9 @@ into the main repository:
   convenience for users of your implementation and I personally find
   it saves a lot of time when I am creating a new implementation to
   have line edit support early in the process.
+
+---
+
+**Good questions that either don't have answer or need more detail**
+
+### Why do some mal forms end in "\*" or "!" (swap!, def!, let\*, etc)?