Update dead-tree journal handling commands

jrnl

@@ -12,12 +12,12 @@ fi
 
 function display_help {
     cat <<EOF
-$PROGNAME [help | add_journal | add_issue | many_issues | git ]
+$PROGNAME [help | add-journal | add-issue | many-issues | git ]
 
 help: show this help
-add_journal: add entry for a journal
-add_issue: add entry for an issue
-many_issues: add many issues
+add-journal: add entry for a journal
+add-issue: add entry for an issue
+many-issues: add many issues
 git: perform git command
 EOF
 }
@@ -135,11 +135,11 @@ case "${COMMAND}" in
         display_help
         exit
         ;;
-    add_journal)
+    add-journal)
         add_journal "$@"
         exit
         ;;
-    add_issue)
+    add-issue)
         add_issue "$@"
         exit
         ;;
@@ -147,7 +147,7 @@ case "${COMMAND}" in
         do_git "$@"
         exit
         ;;
-    many_issues)
+    many-issues)
         many_issues "$@"
         exit
         ;;