[Keymap] Some updates to mechmerlin userspace and keymaps (#14711)

users/mechmerlin/changelog.md

@@ -1,6 +1,15 @@
 # Changelog
 All notable changes to my userspace will be documented in this file.
 
+## [0.4.0] - 2021-10-05
+
+### Added
+- Introduced new keycode KV_VER to output the version of QMK. Thanks to drashna for this. 
+
+### Changed
+- Updated keymaps to use underscores instead of KC_TRNS as it was getting hard to read for my tired eyes. 
+- Updated readmes on my preferred layouts.
+
 ## [0.3.0] - 2020-02-02
 ### Changed
 - Added the `_CL` layer to all the boards for access to `EEP_RST` and `RESET` keycodes. This was done primarily to avoid triggering `RESET` accidentally. 

users/mechmerlin/mechmerlin.c

@@ -1,4 +1,7 @@
 #include "mechmerlin.h"
+#include "version.h"
+
+#define TAP_CODE_DELAY 10
 
 bool process_record_user(uint16_t keycode, keyrecord_t *record) {
     static uint16_t fnx_layer_timer;
@@ -15,9 +18,9 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
                 }
             }
         break;
-        case KC_MAC:
+        case KC_VER:
             if (record->event.pressed) {
-                SEND_STRING("meow");
+                send_string_with_delay_P(PSTR(QMK_KEYBOARD "/" QMK_KEYMAP " @ " QMK_VERSION ", Built on: " QMK_BUILDDATE), TAP_CODE_DELAY);
             } else {
             }
         break;

users/mechmerlin/mechmerlin.h

@@ -12,7 +12,7 @@ enum userspace_layers {
 // Enum of custom keycodes defined in process_record_user
 enum keycodes {
     KC_FNX, // Hold for FN layer, tap to toggle ARROWS layer.
-    KC_MAC, // Text macro.
+    KC_VER, // Version macro.
 };
 
 // Custom #defined keycodes

users/mechmerlin/readme.md

@@ -1,4 +1,4 @@
-# MechMerlin's Userspace v0.2.0
+# MechMerlin's Userspace v0.4.0
 
 This is a collection of my most commonly used QMK features. 
 
@@ -32,6 +32,10 @@ It is used primarily on my `LAYOUT_60_ansi` boards as my regular toggle (the 1u
 
 This is just a wrapper for `CTL_T(KC_CAPS)`. This is a hold for control and tap for caps lock. 
 
+### KC_VER 
+
+Output the version of QMK Firmware on device. 
+
 ## QMK Features
 ----