Adapt sh-to-mod alias parsing for Dash 0.5.13

Instead of being listed as name='value', aliases are now reported as
'name=value' on new Dash version (0.5.13).

Signed-off-by: Xavier Delaruelle <xavier.delaruelle@cea.fr>

Author: xdelaruelle

NEWS.rst

@@ -32,6 +32,8 @@ Modules 5.7.0 (not yet released)
   is observed when loading or unloading many modulefiles. (fix issue #603)
 * Script: add ``--with-lmod`` option to :command:`mb` command to compare
   current Modules version against an installed version of Lmod.
+* Update the :subcmd:`sh-to-mod` mechanism to correctly parse shell alias on
+  Dash shell version 0.5.13.
 
 
 .. _5.6 release notes:

tcl/mfcmd.tcl

@@ -1381,7 +1381,7 @@ proc execShAndGetEnv {elt_ignored_list shell script args} {
             2>/dev/null; echo $sep; alias; echo $sep; echo $sep; pwd"
          set varre {export (\S+?)=["']?(.*?)["']?$}
          set funcre {(\S+?) \(\)\s?\n?{\s?\n(.+?)\n}$}
-         set aliasre {(\S+?)='(.*?)'$}
+         set aliasre {([^='\s]+?)='?(.*?)'$}
          set varvalmap [list {\"} \" \\\\ \\]
          set alvalmap [list {'\''} ' {'"'"'} ']
       }