Update _.template docs.
Merge pull request #1899 from braddunbar/interpolate-values

Update _.template docs.
Partial support for constructors
Merge pull request #1733 from megawac/partial-constructor

Partial support for constructors
Result fallback can be a function
Merge pull request #1900 from megawac/result-fallback-fn

Result fallback can be a function
Revert "Result fallback can be a function"

This reverts commit b8a07d1d94cd6d4586e89a63fda41f2814dc63ce.