No need for a “minor miracle” Tuesday night. A night after committing four errors — matching a season-high — yet still pulling out a win over the Rockies, the Giants played a clean game Tuesday night, benefitting from an effective bullpen, more pop from their September star and Austin Slater’s return to the starting lineup to pull out a 6-3 win over Colorado. The Giants won their second game in a row to improve to 71-77, safely seven games ahead of Colorado (64-84) in last place and three ahead of fourth-place Arizona (68-80). Securing at least a split in this four-game series, they will go fo…