README typo fixes

README.md

@@ -1,9 +1,9 @@
 wkhtmltopdf and wkthmltoimage
 -----------------------------
 
-wkhtmltopdf and wkhtmltoimage are a command line tools to render HTML into PDF
-and various image formats using the QT Webkit rendering engine. This tool runs
-entirely "headless" and does not require a display or display service.
+wkhtmltopdf and wkhtmltoimage are command line tools to render HTML into PDF
+and various image formats using the QT Webkit rendering engine. These run
+entirely "headless" and do not require a display or display service.
 
 
 Usage