make-template for inputs omits the format tag

## Expected Behavior
Given the cwl definition as an example
```
https://github.com/common-workflow-library/bio-cwl-tools/bwa/BWA-Index.cwl
```

Which has the inputs:
```
inputs:
InputFile:
type: File
format: http://edamontology.org/format_1929 # FASTA
inputBinding:
position: 200

IndexName:
type: string
inputBinding:
prefix: "-p"
valueFrom: $(self + ".bwt")
```

When I run:

```
cwltool --make-template ./bwa/BWA-Index.cwl
```

I would get:
```
InputFile: # type "File"
class: File
format: http://edamontology.org/format_1929
path: a/file/path
IndexName: a_string # type "string"
```

## Actual Behavior
format for InputFile is missing.
```
InputFile: # type "File"
class: File
path: a/file/path
IndexName: a_string # type "string"
```

## Workflow Code
```
git clone https://github.com/common-workflow-library/bio-cwl-tools
cwltool --make-template ./bwa/BWA-Index.cwl
```

## Your Environment
* cwltool version: 3.0.20200324120055