indent: remove strange debugging code that went in the output file

Whenever the code to be output contained the magic byte 0x80, instead of
writing this byte, indent wrote the column number at the beginning of
the code snippet, times 7.  Especially the 'times 7' does not make any
sense at all.

In ISO-8859-1, this character position is not assigned.  In Microsoft
Codepage 1252 it is the Euro sign.  In UTF-8 (which was probably not on
the author's list when the code was originally written) it occurs as the
middle byte for code points like U+2026 (horizontal ellipsis) from the
block General Punctuation.

Remove this strange code, thereby fixing indent for UTF-8 code.  The
code had been there since at least 1993-04-09, when it was first
imported to NetBSD.

(rillig)