largefiles: rename local variable appropriately repo['.'] is called not as "working context" but as "parent context". In this code path, hash value of current content of file should be compared against hash value recorded in "parent context". Therefore, "wctx" may cause misunderstanding in this case.

largefiles: avoid redundant loop to eliminate None from list Before this patch, this code path contains two loops for m._files: one for replacement with standin, and another for elimination of None, which comes from previous replacement ("standin in wctx or lfdirstate[f] == 'r'" case in tostandin()). These two loops can be unified into simple one "for" loop.