Add rmul!

Fixes #496

Author: ararslan

README.md

@@ -400,6 +400,8 @@ Currently, the `@compat` macro supports the following syntaxes:
 
 * `LinSpace` is now `LinRange` ([#25896]).
 
+* `scale!` is now `rmul!` ([#25571]).
+
 * `isupper`, `islower`, `ucfirst` and `lcfirst` are now `isuppercase`, `islowercase`,
   `uppercasefirst` and `lowercasefirst` ([#26442]).
 

src/Compat.jl

@@ -1842,6 +1842,13 @@ else
     using LinearAlgebra: qr
 end
 
+if VERSION < v"0.7.0-DEV.3449"
+    const rmul! = Base.scale!
+    export rmul!
+else
+    using LinearAlgebra: rmul!
+end
+
 include("deprecated.jl")
 
 end # module Compat

test/runtests.jl

@@ -1727,4 +1727,6 @@ let A = [1 2; 1 2; 1 2]
     @test f[1] * [f[2]; [0 0]] ≈ A[:,f[3]]
 end
 
+@test rmul!([1 2; 3 4], 2) ≈ [2 4; 6 8]
+
 nothing