Fix for format flags not working on single endpoints

[MushroomMaula]

Basic fix for #47

[codecov]

Codecov Report

Merging #48 into master will decrease coverage by 0.3%.
The diff coverage is 80%.

@@            Coverage Diff             @@
##           master      #48      +/-   ##
==========================================
- Coverage   85.55%   85.25%   -0.31%     
==========================================
  Files           6        6              
  Lines         270      278       +8     
==========================================
+ Hits          231      237       +6     
- Misses         39       41       +2

Impacted Files	Coverage Δ
tortilla/wrappers.py	88.76% <80%> (-0.65%)	⬇️

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[MushroomMaula]

I just saw there is an error when using python 2 because of my encoding fix. The best idea would probably be to just use normal chars in the tests.