Fix some command short descriptions (#470)

Tidy up command short descriptions for consistency with other commands.

Author: andrew-farries

cmd/init.go

@@ -11,7 +11,7 @@ import (
 
 var initCmd = &cobra.Command{
 	Use:   "init <file>",
-	Short: "Initializes pgroll, creating the required pg_roll schema to store state",
+	Short: "Initialize pgroll in the target database",
 	RunE: func(cmd *cobra.Command, args []string) error {
 		m, err := NewRoll(cmd.Context())
 		if err != nil {

cmd/pull.go

@@ -19,7 +19,7 @@ func pullCmd() *cobra.Command {
 
 	pullCmd := &cobra.Command{
 		Use:   "pull <target directory>",
-		Short: "pull migration history from the target database and write it to disk",
+		Short: "Pull migration history from the target database and write it to disk",
 		Args:  cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			ctx := cmd.Context()