Lines are quoted from the official notes; buff/nerf tags are auto-classified from the numbers and can be wrong. Covers the 14 most recent Dota 2 patches PatchMeter has fetched.
▼nerfDamage at level 1 decreased from 51–58 to 49–56
✕removedPrecision AuraNo longer levels with Marksmanship
⇄adjustPrecision AuraAgility Base Bonus rescaled from 4/8/12/16% to 10%
⇄adjustFrost ArrowsNow also modifies incoming healing with Aghanim's Scepter
⇄adjustGustKnockback duration now scales inversely with distance from the target, similar to knockback distance. Minimum knockback duration is 0.4 seconds
⇄adjustMultishotNow allows Drow Ranger to move with a 35% penalty and use items while casting Multishot
✕removedGlacierNo longer increases the number of Multishot arrows
✕removedGlacierNo longer grants True Strike on the hill
▲buffGlacierNow Drow Ranger deals 25% more damage when attacking from high ground while on the Glacier