fix a typing error

[prakhar2b]

Related issues
A typo in the developer guide : This produces and an OpWorkflowModel which can then be saved to disk and applied to another dataset.

[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @prakhar2b to sign the Salesforce.com Contributor License Agreement.

[codecov]

Codecov Report

Merging #259 into master will decrease coverage by 10.93%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #259       +/-   ##
===========================================
- Coverage    86.6%   75.67%   -10.94%     
===========================================
  Files         315      315               
  Lines       10341     6002     -4339     
  Branches      325      291       -34     
===========================================
- Hits         8956     4542     -4414     
- Misses       1385     1460       +75

Impacted Files	Coverage Δ
...sforce/op/stages/base/binary/BinaryEstimator.scala	0% <0%> (-100%)	⬇️
...la/com/salesforce/op/aggregators/Geolocation.scala	0% <0%> (-100%)	⬇️
...ala/com/salesforce/op/testkit/InfiniteStream.scala	0% <0%> (-100%)	⬇️
...la/com/salesforce/op/utils/io/avro/AvroInOut.scala	0% <0%> (-100%)	⬇️
...rce/op/stages/impl/feature/JaccardSimilarity.scala	0% <0%> (-100%)	⬇️
.../salesforce/op/aggregators/FeatureAggregator.scala	0% <0%> (-100%)	⬇️
...cala/com/salesforce/op/features/types/OPList.scala	0% <0%> (-100%)	⬇️
...n/scala/com/salesforce/op/readers/CSVReaders.scala	0% <0%> (-100%)	⬇️
...stages/base/sequence/BinarySequenceEstimator.scala	0% <0%> (-100%)	⬇️
.../scala/com/salesforce/op/readers/CSVDefaults.scala	0% <0%> (-100%)	⬇️
... and 204 more

---

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[codecov]

Codecov Report

Merging #259 into master will decrease coverage by 3.94%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #259      +/-   ##
==========================================
- Coverage    86.6%   82.66%   -3.95%     
==========================================
  Files         315      315              
  Lines       10341    10341              
  Branches      325      542     +217     
==========================================
- Hits         8956     8548     -408     
- Misses       1385     1793     +408

Impacted Files	Coverage Δ
...alesforce/op/cli/gen/templates/SimpleProject.scala	0% <0%> (-100%)	⬇️
.../scala/com/salesforce/op/cli/gen/ProblemKind.scala	0% <0%> (-100%)	⬇️
...cala/com/salesforce/op/cli/gen/FileInProject.scala	0% <0%> (-100%)	⬇️
...in/scala/com/salesforce/op/cli/CommandParser.scala	0% <0%> (-98.12%)	⬇️
...cala/com/salesforce/op/cli/gen/ProblemSchema.scala	0% <0%> (-96.56%)	⬇️
...src/main/scala/com/salesforce/op/cli/gen/Ops.scala	0% <0%> (-94%)	⬇️
...ain/scala/com/salesforce/op/cli/SchemaSource.scala	0% <0%> (-87.94%)	⬇️
...a/com/salesforce/op/cli/gen/ProjectGenerator.scala	0% <0%> (-87.5%)	⬇️
...in/scala/com/salesforce/op/cli/CliParameters.scala	0% <0%> (-80.96%)	⬇️
...src/main/scala/com/salesforce/op/cli/CliExec.scala	0% <0%> (-80%)	⬇️
... and 3 more

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #259 into master will decrease coverage by 10.93%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #259       +/-   ##
===========================================
- Coverage    86.6%   75.67%   -10.94%     
===========================================
  Files         315      315               
  Lines       10341     6002     -4339     
  Branches      325      291       -34     
===========================================
- Hits         8956     4542     -4414     
- Misses       1385     1460       +75

Impacted Files	Coverage Δ
...sforce/op/stages/base/binary/BinaryEstimator.scala	0% <0%> (-100%)	⬇️
...la/com/salesforce/op/aggregators/Geolocation.scala	0% <0%> (-100%)	⬇️
...ala/com/salesforce/op/testkit/InfiniteStream.scala	0% <0%> (-100%)	⬇️
...la/com/salesforce/op/utils/io/avro/AvroInOut.scala	0% <0%> (-100%)	⬇️
...rce/op/stages/impl/feature/JaccardSimilarity.scala	0% <0%> (-100%)	⬇️
.../salesforce/op/aggregators/FeatureAggregator.scala	0% <0%> (-100%)	⬇️
...cala/com/salesforce/op/features/types/OPList.scala	0% <0%> (-100%)	⬇️
...n/scala/com/salesforce/op/readers/CSVReaders.scala	0% <0%> (-100%)	⬇️
...stages/base/sequence/BinarySequenceEstimator.scala	0% <0%> (-100%)	⬇️
.../scala/com/salesforce/op/readers/CSVDefaults.scala	0% <0%> (-100%)	⬇️
... and 204 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7cd8aa2...b9fa09c. Read the comment docs.

[gerashegalov]

LGTM