gcode_macro: Disallow whitespace in macro name (#4312)

Signed-off-by: Florian Heilmann <Florian.Heilmann@gmx.net>

klippy/extras/gcode_macro.py

@@ -113,6 +113,10 @@ def load_config(config):
 
 class GCodeMacro:
     def __init__(self, config):
+        if len(config.get_name().split()) > 2:
+            raise config.error(
+                    "Name of section '%s' contains illegal whitespace"
+                    % (config.get_name()))
         name = config.get_name().split()[1]
         self.alias = name.upper()
         self.printer = printer = config.get_printer()