Reorganize some source code files (#55)

Author: DilumAluthge

src/GitCommand.jl

@@ -2,9 +2,9 @@ module GitCommand
 
 import Git_jll
 
-# export @git_cmd
 export git
 
 include("git.jl")
+include("git_cmd.jl")
 
-end # end module GitCommand
+end # module

src/git.jl

@@ -1,14 +1,3 @@
-function _git_cmd(str::AbstractString;
-                  adjust_PATH::Bool = true,
-                  adjust_LIBPATH::Bool = true)
-    cmd = git(; adjust_PATH, adjust_LIBPATH)
-    return `$(cmd) $(split(str))`
-end
-
-macro git_cmd(ex)
-    return _git_cmd(ex)
-end
-
 function git(; adjust_PATH::Bool = true, adjust_LIBPATH::Bool = true)
     @static if Sys.iswindows()
         return Git_jll.git(; adjust_PATH, adjust_LIBPATH)::Cmd

src/git_cmd.jl

@@ -0,0 +1,10 @@
+function _git_cmd(str::AbstractString;
+                  adjust_PATH::Bool = true,
+                  adjust_LIBPATH::Bool = true)
+    cmd = git(; adjust_PATH, adjust_LIBPATH)
+    return `$(cmd) $(split(str))`
+end
+
+macro git_cmd(ex)
+    return _git_cmd(ex)
+end