`ExpandMemoryShorthands` flags `B` to expand to "bytes" when it's part of a hyphenated term.

**What got flagged?**

**Why is this incorrect?**

This `B` is part of the hyphenated compound term `B-tree`. But that would often be written as `B tree` without the hyphen, so shouldn't be flagged either.

Start at the ExpandMemoryShorthands rule and reproduce the report with the hyphenated term B-tree and the unhyphenated form B tree. Trace how each form is classified, then add coverage showing that the B in both forms is not expanded to "bytes"; the issue is done when those examples no longer trigger the incorrect flag.

Written by the indexing model from the issue text.