Format fixes in 2000/jarijyrki/README.md

I've now looked at the entire README.md file and fixed formatting.

I also renamed the sheet1.info file to finance.sheet as it seems a more
appropriate name for usability.

2000/jarijyrki/Makefile

@@ -115,7 +115,7 @@ ENTRY= jarijyrki
 PROG= ${ENTRY}
 #
 OBJ= ${PROG}.o
-DATA= sheet1.info
+DATA= finance.sheet
 TARGET= ${PROG}
 #
 ALT_OBJ=