How do you delete trailng white space in emacs? -

i have text file has fixed length lines, padded trailing spaces like:

hello world                 ↩ other line     ↩ x                           ↩ 

and want remove trailing spaces on each line looks like

hello world↩ other line↩ x↩ 

is possible write emacs macro can solve this?

edit: lines can have arbitrary number of spaces in before trailing spaces @ end, so

hi     world                ↩ 

can valid line in file.

emacs has built-in fixup-whitespace (m-space), shrinks more 1 space 1 space:

hello      world         ↩                     ^                   cursor   m-x fixup-whitespace  hello world ↩            ^          cursor 

so, can define macro that:

• first calls fixup-whitespace
• then removes last whitespace

another 1 m-x replace-regexp ret [ ]+' ret ' ret, solves problem using regular expressions.