typos (#430)

Author: spaette

src/beta_inc.jl

@@ -256,7 +256,7 @@ External links: [DLMF](https://dlmf.nist.gov/8.17.22), [Wikipedia](https://en.wi
 
 See also: [`beta_inc`](@ref)
 
-# Implemention
+# Implementation
 `BASYM(A,B,LAMBDA,EPS)` from Didonato and Morris (1982)
 """
 function beta_inc_asymptotic_symmetric(a::Float64, b::Float64, lambda::Float64, epps::Float64)

src/gamma.jl

@@ -209,7 +209,7 @@ end
 # So identifying the (something) with the -zeta function, we get
 # the zeta function for free and might as well export it, especially
 # since this is a common generalization of the Riemann zeta function
-# (which Julia already exports).   Note that this geneneralization
+# (which Julia already exports).   Note that this generalization
 # is equivalent to Mathematica's Zeta[s,z], and is equivalent to the
 # Hurwitz zeta function for real(z) > 0.