Those are old boundaries of high resolution coverage areas.

Dunno if they are unused anymore. IMHO they can be deleted.

IIRC also those areas which are referred are mostly outdated.

Its ancient, before coverage was good.

You can remove it as far as it matters to me.

Das ist natürlich blöd gelaufen dann. Die sind mit einem Tracer abgetraced.

JOSM fixed multiple whitespaces. Dunno what the tag means

Correction: changeset comment = Fixing stuff with JOSM validator and OSM Inspector. Merging up doubled nodes. Also fixing opening hours, self-intersecting ways and ways with double segments.

reverted and filed a ticket

No Spam. Fixing nodes which share the same position.

Wrong changeset-comment.
Frechen: Streets, Buildings, Landuse and more

Im fixing double nodes from http://tools.geofabrik.de/osmi/?view=areas&overlays=duplicate_node

http://nenner.github.io/achavi/?changeset=48990332

I meant, that I used the validator in JOSM to fix issues like double nodes and other auto-fixable issues. After that i fixed some issues of ways with double segments.

wrong changeset name and source.

name: Frechen: Straßen, Häuser und mehr
source: Bing, ALKIS (NRW)

Wrong changeset comment.

Comment: Frechen: Straßen, Häuser und mehr
Source: NRW-Atlas: ALKIS; Bing

Sorry, wrong changeset comment.

Comment: "Frechen: Straßen, Häuser und mehr"
Source: "Bing, ALKIS"

Wrong description.

Description:
Lanes and Turn lanes.

osm.wiki/DE:Tag:junction%3Droundabout

"Es ist nicht notwendig, oneway=yes für den Kreisverkehr selbst anzugeben, da dies implizit angenommen wird."

The line is only visible in JOSM !

On which map?

Its the outer border of the Bing mapcoverage area for africa.

Its not rendered on normal maps and only visible in your editor. Please just ignore the line and dont delete it again.

Not spam.

Part of the areaborder of Hi-Res Bing coverage satelite imagery.

Its useful for the http://tasks.hotosm.org/ team to determine if imagery of the area is available.