Fix HOLDS RegEx eating non-identifier characters when replacing field name

Fix HOLDS RegEx eating non-identifier characters when replacing field name

Change-Id: Iebd2cdaa294a4f97022da87a89d90d79d111de90

Fix HOLDS RegEx eating non-identifier characters when replacing field name

Fix HOLDS RegEx eating non-identifier characters when replacing field name. This small edit uses the prettier \b instead of \\b.

Change-Id: Iebd2cdaa294a4f97022da87a89d90d79d111de90