Add missing space

Author: CollieIsCute

lkmpg.tex

@@ -264,7 +264,7 @@ \subsection{The Simplest Module}
 	$(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
 \end{code}
 
-In \verb|Makefile|, \verb|$(CURDIR)| can be set to the absolute pathname of the current working directory(after all \verb|-C| options are processed, if any). 
+In \verb|Makefile|, \verb|$(CURDIR)| can be set to the absolute pathname of the current working directory (after all \verb|-C| options are processed, if any). 
 See more about \verb|CURDIR| in \href{https://www.gnu.org/software/make/manual/make.html}{GNU make manual}.
 
 And finally, just run \verb|make| directly.