Renamed history --output_file to --output-file to follow common command-line practices (#1527)

Author: kmvanbrunt

CHANGELOG.md

@@ -36,6 +36,7 @@ time reading the [rich documentation](https://rich.readthedocs.io/).
     - `decorators` module breaking changes:
         - `_set_parser_prog` renamed to `set_parser_prog` (without the leading underscore) and moved
           to `argparse_custom` module
+    - Renamed history `--output_file` to `--output-file` to follow common command-line practices
 
 - Enhancements
     - Enhanced all print methods (`poutput()`, `perror()`, `ppaged()`, etc.) to natively render

cmd2/cmd2.py

@@ -5029,7 +5029,7 @@ def _build_history_parser(cls) -> Cmd2ArgumentParser:
         history_action_group.add_argument('-e', '--edit', action='store_true', help='edit and then run selected history items')
         history_action_group.add_argument(
             '-o',
-            '--output_file',
+            '--output-file',
             metavar='FILE',
             help='output commands to a script file, implies -s',
             completer=cls.path_complete,

docs/features/history.md

@@ -189,7 +189,7 @@ each command. This is great when displaying history to the screen because it giv
 reference to identify previously entered commands. However, when creating a script or a transcript,
 the command numbers would prevent the script from loading properly. The `-s` or `--script` option
 instructs the `history` command to suppress the line numbers. This option is automatically set by
-the `--output_file`, `--transcript`, and `--edit` options. If you want to output the history
+the `--output-file`, `--transcript`, and `--edit` options. If you want to output the history
 commands with line numbers to a file, you can do it with output redirection:
 
     (Cmd) history 1:4 > history.txt