Simplify command regex

lib/imap.js

@@ -20,7 +20,7 @@ var CRLF = '\r\n',
     },
     RE_LITHEADER = /(?:((?:BODY\[.*\])?|[^ ]+) )?\{(\d+)\}$/i,
     RE_UNRESP = /^\* (OK|PREAUTH|NO|BAD) (?:\[(.+)\] )?(.+)$/i,
-    RE_CMD = /^([A-Za-z]+)(?: |$)/i,
+    RE_CMD = /^([^ ]+)(?: |$)/,
     REX_UNRESPDATA = XRegExp('^\\* (?:(?:(?<type>NAMESPACE) (?<personal>(?:NIL|\\((?:\\(.+\\))+\\))) (?<other>(?:NIL|\\((?:\\(.+\\))+\\))) (?<shared>(?:NIL|\\((?:\\(.+\\))+\\))))|(?:(?<type>FLAGS) \\((?<flags>.*)\\))|(?:(?<type>LIST|LSUB|XLIST) \\((?<flags>.*)\\) (?<delimiter>".+"|NIL) (?<mailbox>.+))|(?:(?<type>(SEARCH|SORT))(?: (?<results>.+))?)|(?:(?<type>STATUS) (?<mailbox>.+) \\((?<attributes>.*)\\))|(?:(?<type>CAPABILITY) (?<capabilities>.+))|(?:(?<type>BYE) (?:\\[(?<code>.+)\\] )?(?<message>.+)))$', 'i'),
     REX_UNRESPNUM = XRegExp('^\\* (?<num>\\d+) (?:(?<type>EXISTS)|(?<type>RECENT)|(?<type>EXPUNGE)|(?:(?<type>FETCH) \\((?<info>.*)\\)))$', 'i');