Improve docs a bit

keyboard/planck/keymaps/cbbrowne/config.h

@@ -9,7 +9,9 @@
 #define randmul 181
 #define randmod 167
 
-/* Filler to make layering a bit clearer */
+/* Filler to make layering a bit clearer *
+ * borrowed from basic keymap            */
+
 #define _______ KC_TRNS
 
 #endif

keyboard/planck/keymaps/cbbrowne/keymap.c

@@ -86,6 +86,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   {KC_LCTL, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_ENT},
   {KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_QUOT },
   {KC_TAB,  M(M_LED), KC_LALT, KC_LGUI, MO(_LW), KC_SPC,  KC_SPC,  MO(_RS), KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT}
+  /* Note that KC_SPC is recorded TWICE, so that either matrix position can activate it */
 },
 [_RS] = { /* RAISE */
   {KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_BSPC},