Typo.

README.md

@@ -39,7 +39,7 @@ To clean everything including temporary files:
 ### Pictures
 Using pictures is relatively straightforward. Every file in the current
 directory with file extension **dot**, **gif**, **jpg**, **png**, **ppm**,
-**svg**, **xcf**, or **dia** will be automatically converted into encapsulated
+**svg**, **xcf**, or **dia** will be automatically converted to encapsulated
 postscript.
 
 Gnuplot files (with extension **gnp**) are converted to encapsulated postscript