some other emacs keyboard shortcup

M-^
Join this line to previous and fix up whitespace at join.

C-q
Read next input character and insert it.This is useful for inserting control
characters. eg. "C-q C-G"

C-x RET f
Set the file coding-system of the current buffer to CODING-SYSTEM.
This means that when you save the buffer, it will be converted
according to CODING-SYSTEM.

C-x r t
Replace rectangle contents with STRING on each line.

C-x r k
Delete the region-rectangle and save it as the last killed one.

C-x r y
Yank the last killed rectangle with upper left corner at point.

untabify
Convert all tabs in region to multiple spaces, preserving columns.

delete-trailing-whitespace
Delete all the trailing whitespace across the current buffer.

C-x C-u
Convert the region to upper case.

C-x C-l
Convert the region to lower case.

M-u
Convert following word to upper case, moving over.

M-l
Convert following word to lower case, moving over.

M-c
Capitalize the following word moving over.

describe-char
Describe the character after POS

Ctrl-u 0 Ctrl-k
Kill the text from POS to beginning of the current line

M-t
Interchange words around point, leaving point at end of them.

C-t
Interchange characters around point, moving forward one character.

C-/
Undo some previous changes.

C-x i
Insert contents of file in current buffer.

C-M-n
Move forward across one balanced group of parentheses.

C-M-p
Move backward across one balanced group of parentheses.

M-z <CHAR>
Kill up to CHAR.


C-M-h
Put mark at end of this defun, point at beginning.

C-x r SPC
Store current location of point in register REGISTER.

C-x r j
Move point to location stored in a register.

C-x r c
Blank out the region-rectangle.

C-x r o
    Blank out the region-rectangle, shifting text right.

C-x C-q
Change whether this buffer is read-only.