✨ deduplicate sources tab by label / TAS-793 #4421
Merged
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This PR deduplicates the sources based on their label.
In rare cases, authors hack line charts to show breaks between line segments. They do so by using the same indicator multiple times. One side effect is that Grapher then shows a source tab for every imported indicator – even when their identical.
For scatter plots like this one that use the same indicator twice with different target years, the sources also appear twice.
I can't think of a situation where the tab label would be exactly the same, but we'd still want to show both tabs. So I decided to deduplicate by label. It would be safer to deduplicate on all of the content, but that seems wasteful.
SVG testet differences come from a previous PR.
Link: https://ourworldindata.org/explorers/poverty-explorer?facet=none&country=BOL~DEU~ALB&Indicator=Share+in+poverty&Poverty+line=%242.15+per+day%3A+International+Poverty+Line&Household+survey+data+type=Show+data+from+both+income+and+consumption+surveys&Show+breaks+between+less+comparable+surveys=true
This is part 2 of 2 in a stack made with GitButler: