I suggest assigning values bufferusage.shared_blks_read + bufferusage.local_blks_read and bufferusage.shared_blks_dirtied + bufferusage.local_blks_dirtied to new variables and using them. This would keep the changed lines within the 80 symbols limit, and make the code more readable overall.
I also believe that changing "misses" to "reads" should belong to 0001 patch since we only change it because we replace AnalyzePageMiss with bufferusage.shared_blks_read + bufferusage.local_blks_read in 0001.