fixed quoting and a comment

Makefile

@@ -49,7 +49,7 @@ install: all
 	@chmod 755 ${DESTDIR}${PREFIX}/bin/dwm
 	@echo installing manual page to ${DESTDIR}${MANPREFIX}/man1
 	@mkdir -p ${DESTDIR}${MANPREFIX}/man1
-	@sed 's/VERSION/${VERSION}/g' < dwm.1 > ${DESTDIR}${MANPREFIX}/man1/dwm.1
+	@sed "s/VERSION/${VERSION}/g" < dwm.1 > ${DESTDIR}${MANPREFIX}/man1/dwm.1
 	@chmod 644 ${DESTDIR}${MANPREFIX}/man1/dwm.1
 
 uninstall:

dwm.h

@@ -152,5 +152,5 @@ extern void view(Arg *arg);			/* views the tag with arg's index */
 /* util.c */
 extern void *emallocz(unsigned int size);	/* allocates zero-initialized memory, exits on error */
 extern void eprint(const char *errstr, ...);	/* prints errstr and exits with 1 */
-extern void spawn(Arg *arg);			/* forks a new subprocess with to arg's cmd */
+extern void spawn(Arg *arg);			/* forks a new subprocess with arg's cmd */