[OS X TeX] Why does this hang so?

[Alain Schremmer]

I am using code that I don't understand, that I have hacked  
extensively by trial and error, and that works beautifully so, I  
hasten to say, what follows is not exactly a life and death matter.

When I run the code, I get a totally unwanted hanging indent as in:

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Here is the part of the code that I suspect controls it:

\newcommand{\DoEnumerate}	%
	{%begin definition
		\begin{enumerate}[{\textbf{\textit{\QuestionHeading}}\hspace{-1mm}}  
\bfseries \jobname .1.]%
			\foreachproblem%
				{%begin for each problem
					\item%
					\label%
						{%
							prob:\thisproblemlabel%
						}%
					\thisproblem%
				}%end for each problem
		\end{enumerate}		
	}%end definition


But no matter where I stick \parindent{-20mm}, it either doesn't do  
anything but indent "Discussion" or LaTeX grinds to a halt. And have  
no idea what else to try.

I realize that this is not precisely a minimal example but wouldn't  
even know where to begin to make up one. Still, I would very much  
appreciate any hint as to what else to try so as to save a tree or two.

Hopeful regards
--schremmer