Review Request 56601: Used single quotes instead of backticks in error message.

[Benjamin Bannier]

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Review request for mesos and Benjamin Mahler.


Repository: mesos


Description
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See summary.


Diffs
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  src/master/validation.cpp 2bfca95713319a195e43e990cbc2dc5570b89c4e 
  src/tests/master_validation_tests.cpp 
fd1f4a6cf0661351e265e50da1bd6ea04ed13d26 

Diff: https://reviews.apache.org/r/56601/diff/


Testing
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make check (OS X)


Thanks,

Benjamin Bannier