Use `empty?` instead of `blank?`
Use `empty?` instead of `blank?`

Using ruby’s empty method should improve performance over active support’s `blank?`

```rb
require "benchmark/ips"

def blank
  "/es/dummy".split('/').reject!(&:blank?)
end

def empty
  "/es/dummy".split('/').reject!(&:empty?)
end

def original
  "/es/dummy".split('/').select! { |seg| !seg.blank? }
end

Benchmark.ips do |x|
  x.report(":blank?")  { blank }
  x.report(":empty?")  { empty }
  x.report("original") { original }
  x.compare!
end
```

```
Calculating -------------------------------------
             :blank?    18.826k i/100ms
             :empty?    33.351k i/100ms
            original    18.942k i/100ms
-------------------------------------------------
             :blank?    336.359k (± 7.3%) i/s -      1.676M
             :empty?      1.168M (± 9.6%) i/s -      5.803M
            original    337.519k (± 6.6%) i/s -      1.686M

Comparison:
             :empty?:  1167838.3 i/s
            original:   337518.9 i/s - 3.46x slower
             :blank?:   336359.2 i/s - 3.47x slower
```
jensb/route_translator,jastix/route_translator,enriclluelles/route_translator,jastix/route_translator,jensb/route_translator,enriclluelles/route_translator