Clarify the format for layout names

diff --git a/docs/feature_layouts.md b/docs/feature_layouts.md
index 24c42c09feb1867f0cd885adba47035c4217c843..bfae9204401833efb2f12762b1c95ce3ed3a0cd7 100644 (file)
--- a/docs/feature_layouts.md
+++ b/docs/feature_layouts.md
@@ -35,10 +35,12 @@ New names should try to stick to the standards set by existing layouts, and can
 
 ## Supporting a Layout
 
-For a keyboard to support a layout, the variable (`[a-z0-9_]`) must be defined in it's `<keyboard>.h`, and match the number of arguments/keys (and preferably the physical layout):
+For a keyboard to support a layout, the variable must be defined in it's `<keyboard>.h`, and match the number of arguments/keys (and preferably the physical layout):
 
     #define LAYOUT_60_ansi KEYMAP_ANSI
 
+The name of the layout must match this regex: `[a-z0-9_]+`
+
 The folder name must be added to the keyboard's `rules.mk`:
 
     LAYOUTS = 60_ansi