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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: ncbi.nlm.nih.gov X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM8PR09MB7095.namprd09.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: ec2e6057-3322-4db4-b4e4-08da9013c594 X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Sep 2022 14:26:21.9357 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 14b77578-9773-42d5-8507-251ca2dc2b06 X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR09MB8332 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE,T_SPF_HELO_PERMERROR autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: > I then see "C-@" echoed in the minibuffer, and the resulting *Help* buffe= r says WFIW, in the DEC VT terminals (from where most of ANSI controls stem from),= Ctrl-Space used to generate a NUL character (ASCII '\0'), and so maybe it is seen as a fill ch= aracter by the OP's terminal and, therefore, is ignored. Anton Lavrentiev Contractor NIH/NLM/NCBI