fix some minor problems

thanks @MichaelHatherly for review :]

Author: exaexa

src/utilities.jl

@@ -190,16 +190,16 @@ function printmethod_format(buffer::IOBuffer, binding::String, args::Vector{Stri
     if method_length_over_limit(
             length(binding) +
             1 +
-            sum(length.(args)) +
-            sum(length.(kws)) +
+            sum(length, args) +
+            sum(length, kws) +
             2*max(0, length(args)-1) +
             2*length(kws) +
             1 +
             length(return_type))
 
         sep_delim = "\n"
         paren_delim = "\n"
-        indent = "  "
+        indent = "    "
     end
 
     print(buffer, binding)
@@ -356,7 +356,7 @@ function printmethod(buffer::IOBuffer, binding::Docs.Binding, func, method::Meth
             type = "::$t"
         end
 
-        string(arg)*type*suffix
+        "$arg$type$suffix"
     end
 
     rt = Base.return_types(func, typesig)