check against literal string 'false'

Ben Wilhelm · Ben Wilhelm · commit 890911f001da · 2020-11-13T16:23:38.000-06:00
diff --git a/main.js b/main.js
@@ -43,7 +43,7 @@ try {
     commitIshOption = `'${commitIsh}'`;
   }
 
-  if (abbrev !== false) {
+  if (abbrev !== "false") {
     abbrevOption = `--abbrev=${abbrev}`;
   }
 
