Fixed step and variable step wiggle files of the same data.

==> fixed_step.wig <==
##genome-build WormBase-cbrenneri WS227
track name="PB2801_EE-1_+_raw_v1" description="PB2801_EE-1_+_raw_v1" type="wiggle_0" color=50,50,150 yLineMark=0.0 yLineOnOff=on visibility=2 maxHeightPixels=40:40:2 priority=1
fixedStep chrom=Cbre_Contig0 start=3501 step=1
2
2
2
2
2
2
2

==> variable_step.wig <==
##genome-build WormBase-cbrenneri WS227
track name="PB2801_EE-1_+_raw_v1" description="PB2801_EE-1_+_raw_v1" type="wiggle_0" color=50,50,150 yLineMark=0.0 yLineOnOff=on visibility=2 maxHeightPixels=40:40:2 priority=1
variableStep chrom=Cbre_Contig0 span=1
3501	2
3502	2
3503	2
3504	2
3505	2
3506	2
3507	2