Make command-repeat work after gdb.execute
Since commit
56bcdbea2bed ("Let gdb.execute handle multi-line commands")
command repetition after using the `gdb.execute` Python function
fails (the previous command is not repeated anymore). This happens
because read_command_lines_1 sets dont_repeat, but the call to
prevent_dont_repeat in execute_gdb_command is later.
The fix is to move the call to prevent_dont_repeat to the beginning of
the function.
Tested on my laptop (ArchLinux-x86_64).
gdb/ChangeLog:
PR python/23714
* gdb/python/python.c (execute_gdb_command): Call
prevent_dont_repeat earlier to avoid affecting dont_repeat.
gdb/testuite/ChangeLog:
PR python/23714
* gdb.python/python.exp: Test command repetition after
gdb.execute.4 files changed
