Use emacs to reformat the following long line of gibberish.
(It represents my so-called file search path.)

First, replace ":" with several blanks each, "    ".
This helps readability, but is not pretty yet.  

One would really like to replace ":" with "<NEWLINE>", which is "c-j"
(see the ascii chart in "~buja/STAT-540/ascii-ctl-characters.txt").

You need to know that special characters that are interpreted in some
contexts can be entered without interpretation by preceding it with
"c-q".  Hence:

a-%:<Enter>c-j<Enter>

----------------------------------------------------------------

:.:/cygdrive/c/mpack/:/cygdrive/e/emacs/emacs-21.2/bin/:/usr/local/bin:/usr/bin:/bin:/cygdrive/c/texmf/miktex/bin:/cygdrive/c/WINNT/system32:/cygdrive/c/WINNT:/cygdrive/c/WINNT/System32/Wbem:/cygdrive/c/Program Files/Hummingbird/Connectivity/7.10/Accessories/:/cygdrive/c/Program Files/R/rw1040/bin/:/cygdrive/e/buja/bin/:/cygdrive/e/emacs/emacs-21.2/bin/:.:/usr/X11R6/bin: