refactor(tools#mpv)!: change default musics_directory

BREAKING CHANGE: `~/Music` is standard on macOS and
also on FreeDesktop's XDG.

autoload/SpaceVim/layers/tools/mpv.vim

@@ -22,7 +22,8 @@
 " The following options can be used with this layer:
 "
 " 1. `mpv_interpreter`: set the path of `mpv`.
-" 2. `musics_directory`: set the path of directory where to store musics.
+" 2. `musics_directory`: set the path of directory where to store musics. The
+" default directory is `~/Music`
 "
 " @subsection Key bindings
 " >
@@ -36,7 +37,7 @@
 if exists('s:musics_directory')
   finish
 else
-  let s:musics_directory = '~/Musics'
+  let s:musics_directory = '~/Music'
   let s:mpv_interpreter = 'mpv'
   let s:loop_mode = 'random'
   let s:stop_mpv = 0

doc/SpaceVim.txt

@@ -4573,7 +4573,8 @@ LAYER OPTIONS
 The following options can be used with this layer:
 
   1. `mpv_interpreter`: set the path of `mpv`.
-  2. `musics_directory`: set the path of directory where to store musics.
+  2. `musics_directory`: set the path of directory where to store musics. The
+default directory is `~/Music`
 
 KEY BINDINGS
 

docs/cn/layers/tools/mpv.md

@@ -30,7 +30,7 @@ tools#mpv 模块默认并未启用，如果需要启用该模块，需要在配
 
 ## 模块选项
 
-- `musics_directory`: 设置音乐存放文件夹
+- `musics_directory`: 设置音乐存放文件夹，默认的文件夹是`~/Music`。
 - `mpv_interpreter`: mpv 可执行命令路径
 - `loop_mode`: 循环模式，默认是 `random`
 

docs/layers/tools/mpv.md

@@ -29,7 +29,7 @@ To use this configuration layer, add it to your `~/.SpaceVim.d/init.toml`.
 
 ## Options
 
-- `musics_directory`: the directory of musics
+- `musics_directory`: the directory of musics. By default this option is `~/Music`.
 - `mpv_interpreter`: mpv executable path
 - `loop_mode`: loop mode, default is `random`