cmd/server: fix typo in command help

Signed-off-by: Javi Fontan <jfontan@gmail.com>

Author: jfontan

cmd/gitbase/command/server.go

@@ -26,7 +26,7 @@ import (
 const (
 	ServerDescription = "Starts a gitbase server instance"
 	ServerHelp        = ServerDescription + "\n\n" +
-		"By default when gitbase encounters and error in a repository it\n" +
+		"By default when gitbase encounters an error in a repository it\n" +
 		"stops the query. With GITBASE_SKIP_GIT_ERRORS variable it won't\n" +
 		"complain and just skip those rows or repositories."
 	TracerServiceName = "gitbase"

docs/using-gitbase/configuration.md

@@ -56,7 +56,7 @@ Usage:
 
 Starts a gitbase server instance
 
-By default when gitbase encounters and error in a repository it
+By default when gitbase encounters an error in a repository it
 stops the query. With GITBASE_SKIP_GIT_ERRORS variable it won't
 complain and just skip those rows or repositories.