Unrestricted length of lines on a page will be breaking the Special:NewPagesFeed (example: https://en.wikipedia.org/wiki/User:XXChestnuttXx/sandbox):
The Console displays the following complaint: <!-- NewPP limit report Parsed by mw2252 Cached time: 20181001183243 Cache expiry: 1900800 Dynamic content: false CPU time usage: 0.036 seconds Real time usage: 0.057 seconds Preprocessor visited node count: 93/1000000 Preprocessor generated node count: 0/1500000 Post‐expand include size: 11281/2097152 bytes Template argument size: 1528/2097152 bytes Highest expansion depth: 14/40 Expensive parser function count: 0/500 Unstrip recursion depth: 0/20 Unstrip post‐expand size: 0/5000000 bytes Number of Wikibase entities loaded: 0/400 Lua time usage: 0.010/10.000 seconds Lua memory usage: 806 KB/50 MB -->