Fix typos in code comments (#852)

Author: musvaage

src/StatsBase.jl

@@ -91,7 +91,7 @@ export
     variation,   # ratio of standard deviation to mean
     sem,         # standard error of the mean, i.e. sqrt(var / n)
     mad,         # median absolute deviation
-    iqr,         # interquatile range
+    iqr,         # interquartile range
 
     genvar,      # generalized variance
     totalvar,    # total variation

src/rankcorr.jl

@@ -212,7 +212,7 @@ function corkendall(X::AbstractMatrix{<:Real}, Y::AbstractMatrix{<:Real})
     return C
 end
 
-# Auxilliary functions for Kendall's rank correlation
+# Auxiliary functions for Kendall's rank correlation
 
 """
     countties(x::AbstractVector{<:Real}, lo::Integer, hi::Integer)

test/empirical.jl

@@ -24,7 +24,7 @@ end
     fnecdfalt = ecdf(x, weights=w2)
     @test fnecdf.sorted_values == fnecdfalt.sorted_values
     @test fnecdf.weights == fnecdfalt.weights
-    @test fnecdf.weights != w1  #  check that w wasn't accidently modified in place
+    @test fnecdf.weights != w1  #  check that w wasn't accidentally modified in place
     @test fnecdfalt.weights != w2
     y = [-1.96, -1.644854, -1.281552, -0.6744898, 0, 0.6744898, 1.281552, 1.644854, 1.96]
     @test isapprox(fnecdf(y), [0.025, 0.05, 0.1, 0.25, 0.5, 0.75, 0.9, 0.95, 0.975], atol=1e-3)