require: fix godoc generation for assertions returning a bool

[Baxromumarov]

Summary

The doc comments for multiple functions in the require package have code examples that are invalid. Example, function doesn't return anything but in the comment it says it return bool value:

testify/require/require.go

Lines 1391 to 1394 in 3f28143

	// if require.NoError(t, err) {
	// require.Equal(t, expectedObj, actualObj)
	// }
	func NoError(t TestingT, err error, msgAndArgs ...interface{}) {

Changes

Changed require.go.tmpl, require_forward.go.tmpl added new generator for them

Motivation

There was a related issue, and the misleading comments needed to be fixed
Issue #1776

[dolmen]

@Baxromumarov Please fix the commit message to "require: fix godoc generation for assertions returning a bool"

[Baxromumarov]

@Baxromumarov Please fix the commit message to "require: fix godoc generation for assertions returning a bool"

@dolmen
done

[Baxromumarov]

@dolmen i don't have access to merge, if my changes are ok please merge it