Fix latent bug in custom word point completion handling

Without this fix, if we switch the "print" completer to custom word
point handling, we regress gdb.base/completion.exp like this:

 (gdb) p "break1.c FAIL: gdb.base/completion.exp: complete 'p "break1' (timeout)

The problem is that completing an expression that starts with double
quotes, and resolves to a filename, like this:

 (gdb) p "break1[TAB]

would change from this, with current master:

 (gdb) p "break1.c"|
         ^^^^^^^^^^|
                   \- cursor here

to this:

 (gdb) p "break1.c |
         ^^^^^^^^^^|
                   \- quote replaced by space

The issue is that completer.c:advance_to_completion_word misses
telling the completion tracker to emulate readline's handling of
completing a string when rl_find_completion_word returns a delimiter.

This commit fixes the latent bug.

gdb/ChangeLog:
2019-06-13  Pedro Alves  <palves@redhat.com>

	* completer.c (advance_to_completion_word): Handle delimiters.

0 files changed, 0 insertions, 0 deletions