switch integral -> integrate

Author: mileslucas

README.md

@@ -100,10 +100,10 @@ term `k`. The order of the resulting polynomial is one higher than the
 order of `p`.
 
 ```julia-repl
-julia> integral(Polynomial([1, 0, -1]))
+julia> integrate(Polynomial([1, 0, -1]))
 Polynomial(x - 0.3333333333333333x^3)
 
-julia> integral(Polynomial([1, 0, -1]), 2)
+julia> integrate(Polynomial([1, 0, -1]), 2)
 Polynomial(2.0 + x - 0.3333333333333333x^3)
 ```
 

docs/src/index.md

@@ -104,14 +104,14 @@ ERROR: Polynomials must have same variable
 ### Integrals and Derivatives
 
 Integrate the polynomial `p` term by term, optionally adding constant
-term `k`. The order of the resulting polynomial is one higher than the
+term `C`. The order of the resulting polynomial is one higher than the
 order of `p`.
 
 ```jldoctest
-julia> integral(Polynomial([1, 0, -1]))
+julia> integrate(Polynomial([1, 0, -1]))
 Polynomial(1.0*x - 0.3333333333333333*x^3)
 
-julia> integral(Polynomial([1, 0, -1]), 2)
+julia> integrate(Polynomial([1, 0, -1]), 2)
 Polynomial(2.0 + 1.0*x - 0.3333333333333333*x^3)
 ```
 

docs/src/reference.md

@@ -68,7 +68,6 @@ variable
 fromroots
 roots
 derivative
-integral
 integrate
 fit
 companion