Fix #101 again

[simonbyrne]

#141 made some changes, however I forgot that content has different error handling behaviour than cat. This is a bit of a kludge, but hopefully should fix #101 again.

[codecov-io]

Codecov Report

Merging #142 into master will decrease coverage by 0.37%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #142      +/-   ##
==========================================
- Coverage   46.21%   45.84%   -0.38%     
==========================================
  Files           6        6              
  Lines         489      493       +4     
==========================================
  Hits          226      226              
- Misses        263      267       +4

Impacted Files	Coverage Δ
src/entry.jl	47.53% <0%> (-0.87%)	⬇️

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[tkelman]

this is exactly what I meant by

we should avoid needing try catches everywhere if the new api is going to throw in a bunch of expected situations

is there an error code or anything? this will silently swallow all GitErrors, including unexpected ones that should still be fatal.

[simonbyrne]

I agree, but this is basically duct tape at this stage. I've tweaked this a bit to be more specific.