This is just a cosmetic remark concerning the Spacing submenu in TeX
mode, which has been recently split into two different submenus called
"Spacing (Text)" and "Spacing (Math)".
I'd like to suggest that they are renamed as "Text Spacing" and "Math
Spacing" respectively because this is the naming scheme used by the
other submenus for the text macros or the maths macros. We already have:
Text Style, Text Size, Text Commands, etc
Math Style, Math Environments, Math Accents, etc.