Gh 138 introduce substitute

[tpodolak]

Closes #138
Introduce substitute refactoring for c#

and VB

@dtchepak please take a look if menu titles looks good to you. Not sure how to document this feature in the docs, any thoughts?

[coveralls]

Pull Request Test Coverage Report for Build 390

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 95.833%

---

Totals
Change from base Build 387:	0.2%
Covered Lines:	2438
Relevant Lines:	2544

---

💛 - Coveralls

[dtchepak]

Looks great!

I can't think of better titles for the refactorings. I was thinking of things like:

Introduce substitutes for missing arguments as readonly fields
Introduce substitutes for missing arguments as local variables
Introduce substitute for {substituteName} as local variable
Introduce substitute for {substituteName} as readonly field

But I think these seem too long. I think people will quickly learn what the current, concise titles mean. WDYT?

For documentation, I think a short summary is enough? Maybe the screen capture is good to add too, I think that is a very good illustration of the feature.

In https://github.com/nsubstitute/NSubstitute.Analyzers/tree/dev/documentation:

### Code refactoring

#### Introduce substitute

Automatically create substitutes for constructor arguments as fields or local variables.

<<screen capture>>

[tpodolak]

Looks great!

I can't think of better titles for the refactorings. I was thinking of things like:

Introduce substitutes for missing arguments as readonly fields
Introduce substitutes for missing arguments as local variables
Introduce substitute for {substituteName} as local variable
Introduce substitute for {substituteName} as readonly field

But I think these seem too long. I think people will quickly learn what the current, concise titles mean. WDYT?

For documentation, I think a short summary is enough? Maybe the screen capture is good to add too, I think that is a very good illustration of the feature.

In https://github.com/nsubstitute/NSubstitute.Analyzers/tree/dev/documentation:

### Code refactoring

#### Introduce substitute

Automatically create substitutes for constructor arguments as fields or local variables.

<<screen capture>>

@dtchepak I decided to leave existing menu titles. In case this causes confusion we can always change them as this is non-breaking change. The docs were updated as well, take a look if it looks ok for you

[dtchepak]

I decided to leave existing menu titles.

I think this is a good decision.

The docs were updated as well, take a look if it looks ok for you

Looks good to me 👍