Syntax highlighting fails with 'less than' symbol #75

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1. github-actions commented on May 13, 2026

   

   github-actionsbot

   on May 13, 2026 – with GitHub Actions

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   Hello and welcome! Thanks for creating your first issue! Someone from our community will get back to you soon!
2. mikecentola

   added

   bugSomething isn't workingSomething isn't working

   on Sep 9, 2026
3. mikecentola

   added the

   Bug

   issue type on Sep 9, 2026
4. mikecentola

   added this to the v0.8 milestone on Sep 9, 2026
5. mikecentola commented on Sep 9, 2026

   

   mikecentola

   on Sep 9, 2026

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   Interesting. I also noticed some weird syntax highlighting in some of the gcode files I have been working with lately as well. I need to go through the syntax highlighting an see if I can reproduce some of this as well.

   Can you paste some actual code from this or attach a text file so I can diagnose?
6. WORMSS commented on Sep 10, 2026

   

   WORMSS

   on Sep 10, 2026

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   M17 ; enable steppers
   M862.1 P[nozzle_diameter] A{(filament_abrasive[0] ? 1 : 0)} F{(nozzle_high_flow[0] ? 1 : 0)} ; nozzle check
   M862.3 P "COREONE" ; printer model check
   M862.5 P2 ; g-code level check
   M862.6 P"Input shaper" ; FW feature check
   M115 U6.8.1+16182
   
   M555 X{(min(print_bed_max[0], first_layer_print_min[0] + 32) - 32)} Y{(max(0, first_layer_print_min[1]) - 4)} W{((min(print_bed_max[0], max(first_layer_print_min[0] + 32, first_layer_print_max[0])))) - ((min(print_bed_max[0], first_layer_print_min[0] + 32) - 32))} H{((first_layer_print_max[1])) - ((max(0, first_layer_print_min[1]) - 4))}
   
   G90 ; use absolute coordinates
   M83 ; extruder relative mode
   
   {if chamber_minimal_temperature[initial_tool]!=0}
   M140 S115 ; set bed temp for chamber heating
   {else}
   M140 S[first_layer_bed_temperature] ; set bed temp
   {endif}
   
   M109 R{((filament_notes[0]=~/.*MBL160.*/) ? 160 : (filament_notes[0]=~/.*HT_MBL10.*/) ? (first_layer_temperature[0] - 10) : (filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX") ? 210 : 170)} ; wait for temp
   
   M84 E ; turn off E motor
   
   G28 ; home all without mesh bed level
   
   {if chamber_minimal_temperature[initial_tool]!=0}
   ; Min chamber temp section
   M104 S{idle_temperature[initial_tool]} ; set idle temp
   G1 Z10 F720 ; set bed position
   G1 X242 Y-9 F4800 ; set print head position
   M191 S{chamber_minimal_temperature[initial_tool]} ; wait for minimal chamber temp
   M141 S{chamber_temperature[initial_tool]} ; set nominal chamber temp
   M107
   M140 S[first_layer_bed_temperature] ; set bed temp
   {else}
   M141 S{chamber_temperature[initial_tool]} ; set nominal chamber temp
   {endif}
   
   {if first_layer_bed_temperature[initial_tool]<=60}
   M106 S70
   {endif}
   G0 Z40 F10000
   M104 T{initial_tool} S{if is_nil(idle_temperature[initial_tool])}100{else}{idle_temperature[initial_tool]}{endif}
   M190 R[first_layer_bed_temperature] ; wait for bed temp
   M107
   
   G29 G ; absorb heat
   
   M109 R{((filament_notes[0]=~/.*MBL160.*/) ? 160 : (filament_notes[0]=~/.*HT_MBL10.*/) ? (first_layer_temperature[0] - 10) : (filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX") ? 210 : 170)} ; wait for MBL temp
   
   M302 S155 ; lower cold extrusion limit to 155C
   
   {if filament_type[initial_tool]=="FLEX"}
   G1 E-4 F2400 ; retraction
   {else}
   G1 E-2 F2400 ; retraction
   {endif}
   
   M84 E ; turn off E motor
   
   G29 P9 X208 Y-2.5 W32 H4
   
   ;
   ; MBL
   ;
   M84 E ; turn off E motor
   G29 P1 ; invalidate mbl & probe print area
   G29 P1 X150 Y0 W100 H20 C ; probe near purge place
   G29 P3.2 ; interpolate mbl probes
   G29 P3.13 ; extrapolate mbl outside probe area
   G29 A ; activate mbl
   
   ; prepare for purge
   M104 S{first_layer_temperature[0]}
   G0 X249 Y-2.5 Z15 F4800 ; move away and ready for the purge
   M109 S{first_layer_temperature[0]}
   
   G92 E0
   M569 S0 E ; set spreadcycle mode for extruder
   
   M591 S0 ; disable stuck detection
   
   ;
   ; Extrude purge line
   ;
   G92 E0 ; reset extruder position
   G1 E{(filament_type[0] == "FLEX" ? 4 : 2)} F2400 ; deretraction after the initial one
   G0 E5 X235 Z0.2 F500 ; purge
   G0 X225 E4 F500 ; purge
   G0 X215 E4 F650 ; purge
   G0 X205 E4 F800 ; purge
   G0 X202 Z0.05 F8000 ; wipe, move close to the bed
   G0 X199 Z0.2 F8000 ; wipe, move quickly away from the bed
   
   M591 R ; restore stuck detection
   
   G92 E0
   M221 S100 ; set flow to 100%

   This is just some of the startup gcode coming out of Prusa Slicer.
   It seems even the github code highlighter has the same issue. But I have been using novy.vsc-gcode extension and that doesn't seem to have the same issue.

   👍React with 👍1Reacted by Mike Centola
7. mikecentola commented on Sep 10, 2026

   

   mikecentola

   on Sep 10, 2026

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   Ok thanks. I'll take a look at their code too and see if there's anything I can notice.

   I think once I can get the machine type selection working it'll make it a little easier since code is so vastly different from CNC machine tools and 3D printers.