[MINOR][PYSPARK][DOCS] Fix examples in PySpark documentation
## What changes were proposed in this pull request?
This PR proposes to fix wrongly indented examples in PySpark documentation
```
- >>> json_sdf = spark.readStream.format("json")\
- .schema(sdf_schema)\
- .load(tempfile.mkdtemp())
+ >>> json_sdf = spark.readStream.format("json") \\
+ ... .schema(sdf_schema) \\
+ ... .load(tempfile.mkdtemp())
```
```
- people.filter(people.age > 30).join(department, people.deptId == department.id)\
+ people.filter(people.age > 30).join(department, people.deptId == department.id) \\
```
```
- >>> examples = [LabeledPoint(1.1, Vectors.sparse(3, [(0, 1.23), (2, 4.56)])), \
- LabeledPoint(0.0, Vectors.dense([1.01, 2.02, 3.03]))]
+ >>> examples = [LabeledPoint(1.1, Vectors.sparse(3, [(0, 1.23), (2, 4.56)])),
+ ... LabeledPoint(0.0, Vectors.dense([1.01, 2.02, 3.03]))]
```
```
- >>> examples = [LabeledPoint(1.1, Vectors.sparse(3, [(0, -1.23), (2, 4.56e-7)])), \
- LabeledPoint(0.0, Vectors.dense([1.01, 2.02, 3.03]))]
+ >>> examples = [LabeledPoint(1.1, Vectors.sparse(3, [(0, -1.23), (2, 4.56e-7)])),
+ ... LabeledPoint(0.0, Vectors.dense([1.01, 2.02, 3.03]))]
```
```
- ... for x in iterator:
- ... print(x)
+ ... for x in iterator:
+ ... print(x)
```
## How was this patch tested?
Manually tested.
**Before**
<img width="601" alt="2016-09-27 2 29 27" src="https://cloud.githubusercontent.com/assets/6477701/18861294/29c0d5b4-84bf-11e6-99c5-3c9d913c125d.png">
<img width="1056" alt="2016-09-27 2 29 58" src="https://cloud.githubusercontent.com/assets/6477701/18861298/31694cd8-84bf-11e6-9e61-9888cb8c2089.png">
<img width="1079" alt="2016-09-27 2 30 05" src="https://cloud.githubusercontent.com/assets/6477701/18861301/359722da-84bf-11e6-97f9-5f5365582d14.png">
**After**
<img width="515" alt="2016-09-27 2 28 19" src="https://cloud.githubusercontent.com/assets/6477701/18861305/3ff88b88-84bf-11e6-902c-9f725e8a8b10.png">
<img width="652" alt="2016-09-27 3 50 59" src="https://cloud.githubusercontent.com/assets/6477701/18863053/592fbc74-84ca-11e6-8dbf-99cf57947de8.png">
<img width="709" alt="2016-09-27 3 51 03" src="https://cloud.githubusercontent.com/assets/6477701/18863060/601607be-84ca-11e6-80aa-a401df41c321.png">
Author: hyukjinkwon <gurwls223@gmail.com>
Closes #15242 from HyukjinKwon/minor-example-pyspark.
2190037757
