1:      1  1 CALL pred cmd_quote.main/2-0 (det) cmd_quote.m:13
mdb> echo on
Command echo enabled.
mdb> print \ foo
mdb: there is no such variable.
mdb> print \\
mdb: there is no such variable.
mdb> print 'foo'
mdb: there is no such variable.
mdb> print '\''
mdb: there is no such variable.
mdb> print ''''
mdb: there is no such variable.
mdb> print \
> foo \
> bar \
> baz
mdb: print: usage error -- type `help print' for help.
mdb> print 'foo
> bar
> baz '
mdb: there is no such variable.
mdb> print '
> foo \
> bar \'
> '
mdb: there is no such variable.
mdb> \\\
> \\\\
Unknown command `\'. Give the command `help' for help.
mdb> \\\\\\\\
Unknown command `\\\\'. Give the command `help' for help.
mdb> \'\'\'\'
Unknown command `'''''. Give the command `help' for help.
mdb> 'foo\''
Unknown command `foo''. Give the command `help' for help.
mdb> \ \ \ .
Unknown command `   .'. Give the command `help' for help.
mdb> '\ \\\''
Unknown command ` \''. Give the command `help' for help.
mdb> '
> unmatched single quote.
mdb> mdb: are you sure you want to quit?