🐛 Fix quaternion printing

The quaternion printing was showing `q2` instead of `q3` in printing to
REPL.

Author: ronisbr

src/quaternion.jl

@@ -781,7 +781,7 @@ function show(io::IO, mime::MIME"text/plain", q::Quaternion{T}) where T
         sq0, " ", aq0, " ",
         sq1, " ", aq1, "⋅", b, "i", d, " ",
         sq2, " ", aq2, "⋅", b, "j", d, " ",
-        sq2, " ", aq2, "⋅", b, "k", d
+        sq3, " ", aq3, "⋅", b, "k", d
     )
 
     return nothing

test/quaternion/functions.jl

@@ -223,7 +223,7 @@ end
     show(io, MIME"text/plain"(), q)
     expected = """
         Quaternion{Float64}:
-          + 1.0 + 2.0⋅i + 2.71828⋅j + 2.71828⋅k"""
+          + 1.0 + 2.0⋅i + 2.71828⋅j + 3.14159⋅k"""
     @test String(take!(io.io)) == expected
 
     # Comapct printing.
@@ -237,6 +237,6 @@ end
     show(io, MIME"text/plain"(), q)
     expected = """
         Quaternion{Float64}:
-          + 1.0 + 2.0⋅\e[1mi\e[0m + 2.71828⋅\e[1mj\e[0m + 2.71828⋅\e[1mk\e[0m"""
+          + 1.0 + 2.0⋅\e[1mi\e[0m + 2.71828⋅\e[1mj\e[0m + 3.14159⋅\e[1mk\e[0m"""
     @test String(take!(io.io)) == expected
 end