tweak message format

Author: aviks

src/JavaCall.jl

@@ -30,12 +30,12 @@ include("reflect.jl")
 
 function __init__()
     if VERSION ≥ v"1.1-" && VERSION < v"1.3-"
-        @warn("JavaCall does not work correctly on Julia v$VERSION. \n " *
+        @warn("JavaCall does not work correctly on Julia v$VERSION. \n" *
                 "Either use Julia v1.0.x, or v1.3.0 or higher.\n"*
                 "For 1.3 onwards, please also set the environment variable `JULIA_COPY_STACKS` to be `1` or `yes`")
     end
     if VERSION ≥ v"1.3-" && get(ENV, "JULIA_COPY_STACKS", "") ∉ ("1", "yes")
-        @warn("JavaCall needs the environment variable `JULIA_COPY_STACKS` to be `1` or `yes`. "*
+        @warn("JavaCall needs the environment variable `JULIA_COPY_STACKS` to be `1` or `yes`.\n"*
               "Calling the JVM may result in undefined behavior.")
     end
 	findjvm()