default map including *.m
=======================================
MatLab   *.m
ObjectiveC *.mm *.m *.h

[--map-<LANG>] removing from *.m from ObjectiveC
=======================================
MatLab   *.m

[--map-<LANG>] adding *.m to Ada
=======================================
Ada      *.adb *.ads *.Ada *.ada *.m
MatLab   *.m
ObjectiveC *.mm *.m *.h

[--map-<LANG>] removing from *.m from ObjectiveC, and adding *.m to Ada
=======================================
Ada      *.adb *.ads *.Ada *.ada *.m
MatLab   *.m

[--map-<LANG>] guessing parser with adding *.m to Ada
=======================================
ada.m: Ada
matlab.m: Ada
objc.m: Ada

[--map-<LANG> --guess-language-eagerly] guessing parser with adding *.m to Ada
=======================================
ada.m: Ada
matlab.m: MatLab
objc.m: ObjectiveC