bin:no-ansi*: Use printf for escape byte

I dislike having the raw escape byte in these scripts. Unfortunately
`sed` does not support interpreting it via an escape sequence, so use
printf for that. To remain POSIX compatible use `\033` and not `\e` or
`\x1b` since I couldn't find these in the printf(1p) manpage.
Unfortunately this brings a second layer of escaping.

.local/bin/no-ansi

@@ -4,4 +4,4 @@
 #
 # Remove ANSI escape sequences.
 
-env LC_ALL=C sed 's/\[[0-?]*[ -/]*[@-~]//g'
+env LC_ALL=C sed "$(printf 's/\033\\[[0-?]*[ -/]*[@-~]//g')"

.local/bin/no-ansi-sgr

@@ -5,4 +5,4 @@
 # Remove ANSI SGR (Select Graphic Rendition) escape sequences, e.g. setting
 # color or bold font.
 
-env LC_ALL=C sed 's/\[[0-?]*[ -/]*m//g'
+env LC_ALL=C sed "$(printf 's/\033\\[[0-?]*[ -/]*m//g')"