single quote -> double quote

rewritegcode.py

@@ -42,10 +42,10 @@ def rewrite_lines(inlines):
     # Home the board after bed is setup
     outlines = "G28\n"
 
-    minx = float('inf')
-    miny = float('inf')
-    maxx = float('-inf')
-    maxy = float('-inf')
+    minx = float("inf")
+    miny = float("inf")
+    maxx = float("-inf")
+    maxy = float("-inf")
 
     for line in inlines:
         x, y = get_xy(line)
@@ -125,5 +125,5 @@ def rewrite_gcode(infile, outfile):
 
     return 0
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(rewrite_gcode(sys.argv[1], sys.argv[2]))