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\" double quote\ooo octal code\[xx] tty control codeTty control codes are only recognized when embedded in strings passed to spec’sbuilt-in functions tty_move() and tty_fmt() . The recognized strings for xx aredescribed in the description of the tty_cntl() function on page 87.For any other character x , \x is just that character. The sequence \ooo representsone to three octal digits that have the ASCII value of a single character. For example,\033 represents the escape character.Acharacter string can be continued over more than one line by using a \ at the endof a line. On the other hand, new lines not preceded with a \ are inserted literallyinto the string.Str ing Patter ns and Wild CardsFor the commands lscmd , lsdef , prdef and syms ,ifthe characters ? or * appear inthe arguments, the argument is taken as a pattern. Only information about thosecommands, macros or symbols that match the pattern is displayed. In forming thepattern, the character ? matches any single character, while * matches any string ofcharacters, including the null string.Command Recall (Histor y)spec standard history feature lets you recall previous commands 1 . Examples of therecognized syntax are:1spec is usually installed with the optional GNU readline history library, atthe spec administrator ’s option.With the readline library, the history syntax is greatly expanded. In addition, features such as command-lineediting, command completion and tilde expansion become available. See the on-line readline help file for detailedinformation.50 REFERENCE MANUAL INTERIM WORK-IN-PROGRESS (8/16/01) NOT FOR GENERAL DISTRIBUTION