Gcode comments in Slic3r 1.2.9

I have a stupid question.
I've been using Slic3r for quite some time and I like it.
Lately, I changed my printer's configuration and added Z probe.
Everything works fine with one problem.
I modified the custom Gcode for start (to adjust for the probe).
And now, when the Gcode from slic3r is generated, it outputs the multiple lines of my custom Gcode into the comments.
However, as there is more than 1 line, the result is like this:

; standby_temperature_delta = -5
; start_gcode = ; My adjustment for Z probe\nG21        ;metric values\nG90        ;absolute positioning\nM82        ;set extruder to absolute mode\nM107       ;start with the fan off\nG91\nG1 X-35 Y-10 Z10 F4800\nG90\nG28 X\nG28 Y\nG1 X40 Y110 F4800\nG28 Z\nG1 Z10 F4800\n; G32 ; not mandatory\n\nG1 X40 Z20 F4800
\n\nG92 E0                  ;zero the extruded length
\nG1 F200 E3              ;extrude 3mm of feed stock
\nG92 E0                  ;zero the extruded length again
\nG1 F4800\n
; temperature = 250

The part gets printed, but at the end the Gcode from the comment gets processed too
I turned off the verbose output, but there was actually no change at all.
Can someone, please, advice, what do I do wrong?

This is stupid.
I added a single line of comment to the end of start gcode - and now it's outputed OK...