improve help for -Ddebug

"Debug" is not a very helpful help message.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

docs/markdown/Builtin-options.md

@@ -74,7 +74,7 @@ machine](#specifying-options-per-machine) section for details.
 | auto_features {enabled, disabled, auto} | auto       | Override value of all 'auto' features                          | no             | no                |
 | backend {ninja, vs,<br>vs2010, vs2012, vs2013, vs2015, vs2017, vs2019, vs2022, xcode} | ninja | Backend to use        | no             | no                |
 | buildtype {plain, debug,<br>debugoptimized, release, minsize, custom} | debug |  Build type to use                    | no             | no                |
-| debug                                | true          | Debug                                                          | no             | no                |
+| debug                                | true          | Enable debug symbols and other information                     | no             | no                |
 | default_library {shared, static, both} | shared      | Default library type                                           | no             | yes               |
 | errorlogs                            | true          | Whether to print the logs from failing tests.                  | no             | no                |
 | install_umask {preserve, 0000-0777}  | 022           | Default umask to apply on permissions of installed files       | no             | no                |

mesonbuild/coredata.py

@@ -1222,7 +1222,7 @@ BUILTIN_CORE_OPTIONS: 'MutableKeyedOptionDictType' = OrderedDict([
     (OptionKey('backend'),         BuiltinOption(UserComboOption, 'Backend to use', 'ninja', choices=backendlist)),
     (OptionKey('buildtype'),       BuiltinOption(UserComboOption, 'Build type to use', 'debug',
                                                  choices=['plain', 'debug', 'debugoptimized', 'release', 'minsize', 'custom'])),
-    (OptionKey('debug'),           BuiltinOption(UserBooleanOption, 'Debug', True)),
+    (OptionKey('debug'),           BuiltinOption(UserBooleanOption, 'Enable debug symbols and other information', True)),
     (OptionKey('default_library'), BuiltinOption(UserComboOption, 'Default library type', 'shared', choices=['shared', 'static', 'both'],
                                                  yielding=False)),
     (OptionKey('errorlogs'),       BuiltinOption(UserBooleanOption, "Whether to print the logs from failing tests", True)),