remove dangling spaces from sample files

[tychonievich]

Dangling spaces are forbidden by ABNF

The relevant parts of section 1.3 of the spec are

Line    = Level D [Xref D] Tag [D LineVal] EOL
LineVal = pointer / lineStr
lineStr = (nonAt / atsign atsign) *nonEOL ; leading @ doubled

and

Note that production LineVal does not match the empty string. Because empty payloads and missing payloads are considered equivalent, both a structure with no payload and a structure with the empty string as its payload are encoded with no LineVal and no space after the Tag.

We have empty LineVals in spaces.ged too, with NOTEs identifying them as intentional. I don't know why we have that, so I have not included fixing that in this PR.

[dthaler]

Probably my typos

[albertemmerich]

ok

[dthaler]

Merging per steering committee agreement 19 October 2023