Use /b to find the default branch, instead of start/end of line

aliases/available/git.aliases.bash

@@ -199,7 +199,7 @@ function gdv() {
 }
 
 function get_default_branch() {
-	if git branch | grep -q '^main$'; then
+	if git branch | grep -q '\main\b'; then
 		echo main
 	else
 		echo master