BEFORE:
Marley was dead, to begin with.

AFTER: ## 'dead,' is bold and green but we lost the space preceding it ##
     Marley wasdead, to begin
     with.

BEFORE:
Marley was dead, to begin with.

AFTER: ## 'dead,' is green. This is correctly rendered. ##
     Marley was dead, to begin
     with.

BEFORE:
Marley was dead, to begin with.

AFTER: ## 'dead,' is bold. This is correctly rendered. ##
     Marley was dead, to begin
     with.

BEFORE:
Marley was dead, to begin with. There is no doubt...

AFTER: ## 'dead, to begin with. ' is underlined/green but the preceding space was lost, and underlining between "begin" and "with" persisted across the margin ##
     Marley wasdead, to begin
     with. There is no
     doubt...

BEFORE:
Marley was dead, to begin with. There is no doubt...

AFTER: ## Underlining only, but again the margin between "begin" and "with" is underlined. ##
     Marley was dead, to begin
     with. There is no
     doubt...