Change from using four space idents to using tabs (#2353)

Author: CLHatch

.editorconfig

@@ -27,8 +27,7 @@ indent_size = 2
 end_of_line = lf
 
 [*.sh]
-indent_style = space
-indent_size = 4
+indent_style = tab
 end_of_line = lf
 switch_case_indent  = true  # like -ci
 space_redirects     = true  # like -sr