[nfc] update docu

Author: ferdymercury

tree/treeplayer/src/TTreeIndex.cxx

@@ -411,7 +411,7 @@ Long64_t TTreeIndex::FindValues(Long64_t major, Long64_t minor) const
 /// If it finds a pair that maches val, it returns directly the
 /// index in the table, otherwise it returns -1.
 /// \warning Due to internal architecture details, the maximum value for `(major, minor)`
-/// for which the function works correctly and consistently in all platforms is `0xFFFFFFFFFFFF`, which is less than `kMaxLong64`.
+/// for which the function works correctly and consistently in all platforms is `0xFFFFFFFFFFFF0`, which is less than `kMaxLong64`.
 /// If an entry corresponding to major and minor is not found, the function
 /// returns the index of the major,minor pair immediately lower than the
 /// requested value, ie it will return -1 if the pair is lower than
@@ -441,7 +441,7 @@ Long64_t TTreeIndex::GetEntryNumberWithBestIndex(Long64_t major, Long64_t minor)
 /// If it finds a pair that maches val, it returns directly the
 /// index in the table, otherwise it returns -1.
 /// \warning Due to internal architecture details, the maximum value for `(major, minor)`
-/// for which the function works correctly and consistently in all platforms is `0xFFFFFFFFFFFF`, which is less than `kMaxLong64`.
+/// for which the function works correctly and consistently in all platforms is `0xFFFFFFFFFFFF0`, which is less than `kMaxLong64`.
 ///
 /// See also GetEntryNumberWithBestIndex