I canβt conclusively confirm this, but based on my observation, I agree 100% with your assessment.
Copies A .. Zand A .. Zand 0 .. 9provide good supporting evidence.
Obviously, the control characters are displayed in a readable format, and sometimes the selected option is not an ideal choice.
eg. C-l .. RETwill be more understood as equivalent C-l .. C-m; and similarly, if it TAB .. C-jappeared asC-i .. C-j
, char, " [], ". , , , , , , , .. .